Malicious PDF — malware analysis report

Static analysis result for SHA-256 018603c84d859097…

MALICIOUS

PDF

44.7 KB Created: 2020-08-10 18:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a57de37cc4e2eb7602552ccf570bd283 SHA-1: 630acbcf2002aae27abe8900df42e95cdd6733d7 SHA-256: 018603c84d85909703e254f974fc9e319ecd7b5dc608809282be66fb94e326f5
154 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to potentially malicious redirectors or link farms. The primary malicious link identified is `https://ttraff.cc/pify?keyword=herman+bavinck+books+pdf`, which is designed to redirect users to further malicious content. The document body, though heavily obfuscated, contains this URL, suggesting a social engineering lure related to book searches.

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=herman+bavinck+books+pdf
    • http://files.merrysny.shop/uploads/1/3/1/4/131454503/kiwebaf_bopipifavetut_gagibav.pdf
    • http://files.goodgirlsgonegrimm.com/uploads/1/3/0/7/130775768/jobaf-luxizosab-vabexufuvajet.pdf
    • http://files.projectcarsesports.com/uploads/1/3/1/4/131455337/niwazubozebi_kebokokelevi_ronafasuzuda_lubebow.pdf
    • http://files.soundisme.com/uploads/1/3/1/4/131453259/gufesomufo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/5492/3925/files/2686074089.pdf
    • https://cdn.shopify.com/s/files/1/0433/5481/6665/files/ecological_adaptation_in_plants.pdf
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/92593446546.pdf
    • https://cdn.shopify.com/s/files/1/0437/4567/3377/files/lorex_eco_stratus.pdf
    • https://cdn.shopify.com/s/files/1/0435/1551/0938/files/bulfinch_s_mythology.pdf
    • https://cdn.shopify.com/s/files/1/0434/2690/6264/files/boruvasoz.pdf
    • https://cdn.shopify.com/s/files/1/0436/0064/2211/files/41611536534.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/37604868145.pdf
    • https://cdn.shopify.com/s/files/1/0430/0596/8537/files/millionaire_next_door_summary.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4965/files/30949704903.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_off00006471.bin
70094e348bad793ed7dc9b0f0f284f9e3fd405f81070690dbbfaf783beae6431		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6471 5204 bytes
font_01_sfnt_off000075ef.bin
ce22b2b25f076f7b995f3c99e64a21225572abe66b12fe6a6f2c807e9209d890		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75EF 9904 bytes
font_02_sfnt_off000097e5.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97E5 4324 bytes

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