Malicious PDF — malware analysis report

Static analysis result for SHA-256 1993547c8d72d819…

MALICIOUS

PDF

42.1 KB Created: 2020-08-06 13:11:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53dbb21bbb530b339fd403a9248541f3 SHA-1: d82eb7cc1202d6f5debb66c1ba34c6cdf2bb3508 SHA-256: 1993547c8d72d8195fb1d99283a6d942f8f26b7e3403ef722eb6607d4bdec5be
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to funnel victims to further malicious content. The document also hosts a large number of external PDF links, many of which are hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicates maliciousness, and the overall structure points to a phishing or scam attempt.

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=pdf+file+download+using+php
    • http://files.larosaparentcoach.com/uploads/1/3/2/7/132740564/8796ea67b65.pdf
    • http://files.nonsportcardshows.com/uploads/1/3/1/4/131438071/sibagejipovez-rofaxodoseranol-wekaxiw.pdf
    • http://files.matthewpeckhamtenor.com/uploads/1/3/1/4/131408581/4497099.pdf
    • http://files.thebotanicalbrownie.com/uploads/1/3/1/6/131606876/4300802.pdf
    • http://files.ashleymaltzmd.com/uploads/1/3/2/6/132695568/6772882.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16994954809.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/piri_anlauttabelle.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/vowimaponerodabofipili.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3487/files/20753394999.pdf
    • https://cdn.shopify.com/s/files/1/0427/8878/2236/files/anthropological_approach_to_the_study_of_religion.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/nojapewezukoxogojufuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91146339154.pdf
    • https://cdn.shopify.com/s/files/1/0449/2250/3323/files/business_english_teacher_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nitupalakisotubawu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/pojameneduxivubozuz.pdf
    • https://cdn.shopify.com/s/files/1/0427/7751/0055/files/atkins_physical_chemistry_9th_edition.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_off00006727.bin
eda7ce89547f3f6b02beac6a5510d3f0a89207ca5046ee40550eca7a7b148dcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6727 5300 bytes
font_01_sfnt_off00007946.bin
87864d31156dd0a5893b2ded7e050067f8ac0928c26ca8f7d8ecbc0b084a14b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7946 10012 bytes

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