Malicious PDF — malware analysis report

Static analysis result for SHA-256 071346c16446e1d0…

MALICIOUS

PDF

39.1 KB Created: 2020-08-24 23:41:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3ace5b4ce8096640a6e6705e7d073ef SHA-1: b958d340b9240c6f1c776fe17ed4ada4f24dee21 SHA-256: 071346c16446e1d0dcda07af1bbc5a376c69509272cb87b3b0384dbb14065d0b
174 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=archived+ap+test+scores+request+form'. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs, one of which is 'https://cdn.shopify.com/s/files/1/0429/6772/8281/files/jabog.pdf'. The document body also contains a reference to the malicious redirector URL. These findings suggest the document's primary purpose is to redirect users to malicious infrastructure.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=archived+ap+test+scores+request+form
    • http://files.maketucafe.co.nz/uploads/1/3/0/9/130969184/5945719.pdf
    • http://files.taylorslaw.com/uploads/1/3/2/8/132814306/98b7559.pdf
    • http://files.americanreferralconnection.com/uploads/1/3/1/0/131070374/vavenidajuvofam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6772/8281/files/jabog.pdf
    • https://cdn.shopify.com/s/files/1/0434/7805/7122/files/aunt_minnie_s_atlas_and_imaging_specific_diagnosis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/6723616217.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1204107997.pdf
    • https://cdn.shopify.com/s/files/1/0437/5917/3790/files/postpartum_hemorrhage_guideline.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/pesukinodetibewivubig.pdf
    • https://cdn.shopify.com/s/files/1/0449/1811/2423/files/essential_amino_acids_and_their_functions.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/87359424826.pdf
    • https://cdn.shopify.com/s/files/1/0464/5611/1272/files/vlookup_excel_spreadsheet_example.pdf
    • https://cdn.shopify.com/s/files/1/0431/9304/1053/files/niwebozidakugob.pdf
    • https://cdn.shopify.com/s/files/1/0429/6520/5141/files/40477188816.pdf
    • https://cdn.shopify.com/s/files/1/0432/4042/3592/files/terafu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/74783305418.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_off000059a9.bin
2fc7f8423a4fd46c63f55277addd43d579d17730a8556bcbd654dd6543fad8fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59A9 5536 bytes
font_01_sfnt_off00006c51.bin
7d9d50637f4a12aa8456160045e73b4d0e58bb280ac16a368458d83568eb793f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C51 10212 bytes

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