Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d46a4439ce7b48c…

MALICIOUS

PDF

54.7 KB Created: 2020-10-22 10:05:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d62cefef58bd3d37cc0315de4dbf1b3b SHA-1: 1d9136c9bfb9802aec568a52d0dc4e822f8e7b51 SHA-256: 2d46a4439ce7b48c96d1836d3ea76ed938c88b6dade7793046b15d9baa2c5c50
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, disguised as a worksheet. The document body and heuristics indicate a link farm strategy, with many embedded links pointing to various PDF files, likely to obscure the malicious destination. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.link/pify?keyword=medicine+man+movie+questions+worksheet+answers In PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/bademasotud-muwoxob-keruluzaraji-tiwifozexomepog.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/6549098.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/4091873.pdfIn PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/fazufate.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/femisizidovesuj-febuxezim-zadisonosusugu-rulidupumajedej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380084/normal_5f8de31841d43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f8a448bee68e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387711/normal_5f90a2fc7383a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368265/normal_5f8a3d323065f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367617/normal_5f888f78c945a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0546/0125/files/happy_21st_anniversary_of_your_29th_birthday.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/75133131446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1966/3522/files/g_switch_3_apk_uptodown.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8392/6171/files/niseko_guided_ski_tours.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0432/0154/files/68744773071.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/81832906903.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/forifepalojerugolimuji.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/los_elementos_una_historia_ilustrada_de_la_tabla_periodica.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/expressive_and_receptive_language_assessment_tools.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4299/8938/files/supertech_diesel_oil_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0888/4375/files/what_makes_a_polar_bond.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6150/1848/files/knights_and_dragons_armor_leveling_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8335/8914/files/57711215170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3707/6889/files/pemeriksaan_barium_enema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5217/8849/files/3547729145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2632/0040/files/histoire_de_la_langue_franaise_rsum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2550/9794/files/85687799368.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7186 5492 bytes
SHA-256: 728ea88ef1ccd290fe86b17e94f52d54b99adcc4addc683fbea8296281be8d26
font_01_sfnt_off0000841e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x841E 15808 bytes
SHA-256: 2a6dd0773014dad18e7e0484f44b5bca6c852ab7f1d53982076a047b6e5ead46
font_02_sfnt_off0000b55c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB55C 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15