Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eb8b5ce013088bb…

MALICIOUS

PDF

68.6 KB Created: 2020-08-06 21:53:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f776454ed80f0abebeed13a26f2e3de4 SHA-1: ab951ad149438d3b9981f98a6c6da3ef7ac9affb SHA-256: 8eb8b5ce013088bb4840be08d9d752c7d8a8914d07303387fb36d8840145d780
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a high number of embedded links, many pointing to domains associated with link farms and redirectors, as indicated by the PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK heuristics. The primary malicious URL identified is https://ttraff.ru/pify?keyword=stats+pdf+vs+cdf. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine the exact lure.

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.ru/pify?keyword=stats+pdf+vs+cdf
    • http://files.winningtouchequineservices.com/uploads/1/3/1/4/131454270/mexukenopelegugek.pdf
    • http://files.newadventuresamejourney.com/uploads/1/3/0/7/130740483/fowagijafexal_vabanapefi.pdf
    • http://files.simpleeating.net/uploads/1/3/1/1/131164472/601048.pdf
    • http://files.meadrdmardigras.org/uploads/1/3/0/7/130739227/fa32f3.pdf
    • http://files.littlepieceofmyheart.com/uploads/1/3/1/4/131453749/eef55.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/polebujuzutiwavewu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73807437975.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61066914906.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9917/files/panofesepopapesidifivejel.pdf
    • https://cdn.shopify.com/s/files/1/0432/2027/1264/files/tisekomutowota.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/87593629608.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4507/files/68836438237.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7870/files/26959453840.pdf
    • https://cdn.shopify.com/s/files/1/0428/5143/4659/files/kitenogadijonup.pdf
    • https://cdn.shopify.com/s/files/1/0434/0813/0213/files/catch_up_growth_pediatrics.pdf
    • https://cdn.shopify.com/s/files/1/0436/1856/6306/files/lajezalebivunuluzijida.pdf
    • https://cdn.shopify.com/s/files/1/0441/4645/8776/files/bizomadezusufipa.pdf
    • https://cdn.shopify.com/s/files/1/0433/2670/1718/files/50475633997.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/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a078.bin
f33041fdd8834f2608aa71bc5dda43bcc0c376a5293415683dd2dc939ebbee1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA078 4588 bytes
font_01_sfnt_off0000b011.bin
e087159fa51a807e808ecffa2cd1f214b71cac3867d00922d58691fc432f9963		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB011 15604 bytes
font_02_sfnt_off0000e12e.bin
26adabe2ae17539f236fe2d18461326d8622b158cdb921a1576c209cd9895148		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE12E 16220 bytes
font_03_sfnt_off0000f692.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF692 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.