Malicious PDF — malware analysis report

Static analysis result for SHA-256 175c10498996126f…

MALICIOUS

PDF

40.3 KB Created: 2020-09-01 21:16:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3291ade366a0efd03ee31b9bc7afa18 SHA-1: f4dc3c38397779dc22ffb49022174f96659f55e9 SHA-256: 175c10498996126f4b35c3e8c4cfddd31cc3a05310b942e00affccb9fb979cb0
154 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, with a primary link pointing to a known malicious redirector. The heuristic firings indicate a PDF link farm, suggesting the document is designed to drive traffic to potentially malicious or SEO-spam sites. While no scripts were explicitly extracted, the PDF structure itself facilitates the embedding of these malicious links, likely as part of a spearphishing campaign.

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/wix?keyword=hygroma+coude+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0457/0683/8172/files/plate_tectonic_theory_in_hindi_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/0152/6948/files/25800504503.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/biblia_king_james_romana.pdf
    • https://cdn.shopify.com/s/files/1/0432/1899/3307/files/bajitekogil.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/6324311593.pdf
    • https://cdn.shopify.com/s/files/1/0428/5887/2998/files/corona_sdk_storyboard.pdf
    • https://cdn.shopify.com/s/files/1/0437/6802/1141/files/annamayya_movie_full_songs.pdf
    • https://cdn.shopify.com/s/files/1/0434/3142/8248/files/kakikuvalivunopogeja.pdf
    • https://cdn.shopify.com/s/files/1/0436/8308/6489/files/raxako.pdf
    • https://cdn.shopify.com/s/files/1/0434/5374/3270/files/dashboard_in_power_bi_report.pdf
    • https://cdn.shopify.com/s/files/1/0437/7450/9213/files/zeziwanexedeliwaduge.pdf
    • https://cdn.shopify.com/s/files/1/0448/2210/2173/files/chaim_potok_my_name_is_asher_lev.pdf
    • https://cdn.shopify.com/s/files/1/0431/3799/0805/files/aws_ec2_securitygroupingress.pdf
    • https://static.usrfiles.com/ugd/c1615c_870fa0ff60e24807824b7f453c1b2749.pdf
    • https://static.usrfiles.com/ugd/724fb5_20d6f7fdf179443a8135fe532804bbbd.pdf
    • https://static.usrfiles.com/ugd/73cb9e_f074664411a64fe19b41313e68f8b9b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_bbde945214f14f028198c3ba786c1036.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_off00005fbd.bin
9f47be623208bec631f210837363d91750f5eab59e5a4606ae7154b4d604a1e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBD 5328 bytes
font_01_sfnt_off000071d6.bin
9dcfa8d0a4804512df2c6054ddee92ce53af6423ab29545afaefebb45876e8dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71D6 10252 bytes

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