Malicious PDF — malware analysis report

Static analysis result for SHA-256 0db7468c2dce26e0…

MALICIOUS

PDF

43.2 KB Created: 2020-08-20 05:50:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9faf40993655c3d4bf51eafd92552a01 SHA-1: 2bde02a97b28f648979d1e8b70f9215650299e3f SHA-256: 0db7468c2dce26e07dc173b886cd2ee30449703ce4150d88c3fdc997f668e416
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=filmorago++windows+7' which is flagged as a malicious redirector, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=filmorago++windows+7
    • http://files.mkhmfg.com/uploads/1/3/0/7/130776676/5048247.pdf
    • http://files.andreawysockiessentials.com/uploads/1/3/1/6/131606652/254da9.pdf
    • http://files.covefiinvestments.com/uploads/1/3/1/4/131438299/pafixiv.pdf
    • http://tikofi.littlepeachfeedingandspeech.com/uploads/1/3/0/8/130874478/2607778.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5528/4378/files/xudutenavedesagitelu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9823/5289/files/statistical_quality_control_book_by_mahajan.pdf
    • https://cdn.shopify.com/s/files/1/0434/6540/8662/files/50810422831.pdf
    • https://cdn.shopify.com/s/files/1/0429/4197/2646/files/corrugated_roofing_sheets_near_me.pdf
    • https://cdn.shopify.com/s/files/1/0430/8176/0935/files/enviar_itinerario_amadeus.pdf
    • https://cdn.shopify.com/s/files/1/0435/3749/8271/files/94046405804.pdf
    • https://cdn.shopify.com/s/files/1/0433/7264/2460/files/rodesabowa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/78519897031.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/oncogenic_osteomalacia.pdf
    • https://cdn.shopify.com/s/files/1/0428/2341/8019/files/fepixovomagireviba.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bd4.bin
269a374a2557291c4106c1a25c26c03e1e4823a5a997c067d105b43af890593a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD4 5272 bytes
font_01_sfnt_off00007db8.bin
10030d7f96f39ccad19551e03230a33095520dd1ed0056b7f6216463730b55be
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB8 10144 bytes