Malicious PDF — malware analysis report

Static analysis result for SHA-256 7170f53bbce1640b…

MALICIOUS

PDF

44.6 KB Created: 2020-09-01 04:39:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 340090103dcfbe6fb92be588e33a2077 SHA-1: 8327e5fac980c072b5b6386448ba08c570feddae SHA-256: 7170f53bbce1640b900d3632bfc1abc6cc943195e111517d7531102f77f2b938
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One prominent link redirects to `ttraff.com`, which is flagged as malicious. The document body, though partially corrupted, contains text related to app store guidelines, likely a lure to encourage clicks on the embedded links. The primary attack pattern involves redirecting users to malicious infrastructure via a link farm.

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/wix?keyword=app+store+submission+guidelines+screenshots In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/69241029407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1451/9966/files/62943708070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6441/7694/files/informatica_etl_testing_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2667/7913/files/kekiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/9593/3347/files/sotovipedewiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/levejovebefejixurufa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9808/7328/files/sibipasenesesimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6052/7265/files/emergency_evacuation_plan_template_nz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2742/3651/files/unblocked_rap_music_sites.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2657/0664/files/pretty_ugly_poem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7078/2614/files/cours_barycentre_premire_s.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9485/2252/files/tata_group_annual_report_2017-_18.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1731/3176/files/63108284870.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_f69efc7993d64722bb3375252cf638f6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a474dd_232231ccc07245d286bda7439bdc3238.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/10b11f_81978d1f9fe14d999ac29c5e172fa7c8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_b027f97643334406a06a94311c84f926.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/599026_a03b666cc00148a0a74cf93bda543662.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f91.bin
2116897e75f04e5d0e1bb01c2f131ae9915a0f6930807bba31f58842092a2b94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F91 5408 bytes
font_01_sfnt_off000081c6.bin
2eafdebd8b688e220738a73dd2fda4c35b444a15274b0ab1a9be2b85b927d3c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81C6 10384 bytes

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