Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ee41e049d5d4dd0…

MALICIOUS

PDF

42.8 KB Created: 2020-08-11 21:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf9bce05879659e1dd199aef0bf83c32 SHA-1: 0c007d9fbcaea088bc94b2641f238d67716c1590 SHA-256: 3ee41e049d5d4dd05974a1c7d401fc63a1ebf8dfc99201a9e7771c2eb730850f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains references to the malicious URL, suggesting a phishing or scam attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=abs+cbn+tv+plus+user+manual+pdf
    • http://files.maclucille.com/uploads/1/3/1/1/131164428/2429342.pdf
    • http://files.casswomack.com/uploads/1/3/1/1/131164399/0f868daa08bdc20.pdf
    • http://mokigejuk.usmgsol.com/uploads/1/3/1/6/131606758/punozevez-rekokajoro-vepopu-bokizabawogixer.pdf
    • http://zazidujob.evergreenforestptsa.org/uploads/1/3/0/8/130874566/45445.pdf
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/72095837147.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1149/files/dorijurojaniwo.pdf
    • https://cdn.shopify.com/s/files/1/0436/7260/0726/files/nidixuzuwotarolon.pdf
    • https://cdn.shopify.com/s/files/1/0432/5936/3478/files/gluten_free_diet_uk.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/kewimetimedubonoduku.pdf
    • https://cdn.shopify.com/s/files/1/0440/5205/4181/files/xubasivozofurivevunas.pdf
    • https://cdn.shopify.com/s/files/1/0428/3911/3895/files/ribewilotozisoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/90442425312.pdf
    • https://cdn.shopify.com/s/files/1/0433/8683/1004/files/75823265422.pdf
    • https://cdn.shopify.com/s/files/1/0434/7723/7920/files/96673673969.pdf
    • https://cdn.shopify.com/s/files/1/0431/0905/6666/files/gugegexaluk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8833338052.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006808.bin
a6a7e232b79b71902dee3c66043f51269d49589e79e982f150b031a93020e707
pdf-font-stream PDF embedded font (sfnt) at offset 0x6808 5488 bytes
font_01_sfnt_off00007a93.bin
ea46496e30d95f0d3a9c658aafab528596d081d2b0041fcc5e079b72f14b137e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A93 10512 bytes