Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bf74251d71b3018…

MALICIOUS

PDF

49.5 KB Created: 2020-08-02 19:17:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa3cb9f49ccc3c9e7c30225862257dfd SHA-1: 1491355a3a218d8a13f5b29a783cf8b3c99c027e SHA-256: 0bf74251d71b30182c1cffd420652f19cb716ce191a79b90129a91183559e5e0
162 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though heavily obfuscated, includes the malicious URL and benign-looking URLs, suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=dr+collins+pcat+study+guide+pdf
    • http://files.adamcohenstudio.com/uploads/1/3/1/0/131070933/zapul.pdf
    • http://files.mindfulnesstrainingsrc.com/uploads/1/3/1/4/131409090/06028820365f.pdf
    • http://files.nttechnology.net/uploads/1/3/0/9/130969904/juguxaxujaxite-vubozunim.pdf
    • http://files.seanlynchbooks.com/uploads/1/3/0/7/130775567/lagosufuxiwasif.pdf
    • http://files.linwoodfarmersmarket.com/uploads/1/3/0/7/130739117/tababezusunir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/2591/4262/files/lewipadawigovodezulivis.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/vogapudujejokawexugixi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5119/6314/files/xabaginipus.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8242/files/mimagenujazewe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11383010616.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1637/files/kuzuduga.pdf
    • https://cdn.shopify.com/s/files/1/0433/2499/7800/files/60598025075.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/q13_news_live.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/muzaloxebomasu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/98514170353.pdf
    • https://cdn.shopify.com/s/files/1/0430/4008/0021/files/zobepabededikuwuful.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007901.bin
81da98d41e2413b8d5735bb652876d398463923c40f60b754a3e4b63cf0658f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7901 5424 bytes
font_01_sfnt_off00008b8e.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B8E 1800 bytes
font_02_sfnt_off0000941c.bin
3579d523717bb4f2854f146861533c01504fdeaa2250010c4665b4104b505189		 pdf-font-stream PDF embedded font (sfnt) at offset 0x941C 10936 bytes

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