Malicious PDF — malware analysis report

Static analysis result for SHA-256 6121de419b3eca6c…

MALICIOUS

PDF

46.9 KB Created: 2020-08-11 00:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b23b154dd0bc984b3c4cf0e5b6db75e SHA-1: f8cef1d01f66ac690a12c8a2ab376fbf2c1d3c61 SHA-256: 6121de419b3eca6c251655502a1cd28337accc30c3203b1b4cac0c3256b352f5
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body also contains this URL, suggesting it's the primary lure. Although the document body is heavily obfuscated, the presence of a 'download button' heuristic and the malicious URL strongly indicate a phishing or scam attempt designed to redirect users to malicious content. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=ccmt+2020+cutoff+pdf
    • http://files.summerraechase.com/uploads/1/3/2/8/132816165/f2dcd6965aa.pdf
    • http://vofij.forzarealty.com/uploads/1/3/2/7/132740285/fogowomijutitukinapi.pdf
    • http://patuminu.restorehopeliberia.org/uploads/1/3/1/4/131407089/detofotikexoxunimod.pdf
    • http://files.pronkzaak.nl/uploads/1/3/1/6/131606020/kupinowamarekib-tugujemebesajux-zinof.pdf
    • http://files.coryblake.org/uploads/1/3/2/6/132681536/rovikemopumuna-zomaripenepedu-viguvatoxem-nejajeluval.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/miwiwepivu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1024/4256/files/too_many_items_1._6._4.pdf
    • https://cdn.shopify.com/s/files/1/0432/4874/6651/files/violencia_en_el_ambito_laboral.pdf
    • https://cdn.shopify.com/s/files/1/0430/0167/5939/files/46676632794.pdf
    • https://cdn.shopify.com/s/files/1/0431/5509/5716/files/55545885106.pdf
    • https://cdn.shopify.com/s/files/1/0435/8687/9651/files/english_worksheets_for_elementary_students.pdf
    • https://cdn.shopify.com/s/files/1/0431/9933/2512/files/samovojesi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9812/8036/files/52713427530.pdf
    • https://cdn.shopify.com/s/files/1/0433/8922/3066/files/lerizupesedetejev.pdf
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/jatube.pdf
    • https://cdn.shopify.com/s/files/1/0433/5039/2984/files/girogumotigeraliw.pdf
    • https://cdn.shopify.com/s/files/1/0431/4536/3616/files/51256345888.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/divetivudemufowifaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/3065/9750/files/fuvavutukikaduzirus.pdf
    • https://cdn.shopify.com/s/files/1/0429/2139/4343/files/d_d_5e_monster_manual.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_off00007b68.bin
04d7c6a3d2e82eae8684f72eab4b37fbacf4cc916b30f6b279cceec6a41f7932		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B68 4964 bytes
font_01_sfnt_off00008c3f.bin
8782f9e490857e275e2ddcf168a86bd52a13850262814e63942e2ac4bd863b7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C3F 9964 bytes

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