Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6bef29acf93ada8…

MALICIOUS

PDF

38.8 KB Created: 2020-08-24 22:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 138e2c8b22f0b946e87d2c98e9758608 SHA-1: 692f0b54c82b4f36e9cb2b72645ae5860e27357e SHA-256: d6bef29acf93ada8b9aa5941c6a1c8e1366db5d92cfc8bdbeb038fb1b18099d1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though partially corrupted, contains the URL that leads to the redirector. This indicates a phishing or scam attempt designed to lead users to malicious infrastructure.

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=youth+cheerleading+uniforms+wholesale
    • http://files.smilesensations.ca/uploads/1/3/1/4/131406950/747358.pdf
    • http://files.tmheath.com/uploads/1/3/1/4/131453253/7b14681d2a.pdf
    • http://nijiv.bethkander.com/uploads/1/3/2/6/132695663/7172256.pdf
    • http://files.back2natureorganics.com/uploads/1/3/1/1/131164425/dawej.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6568/files/62425291090.pdf
    • https://cdn.shopify.com/s/files/1/0430/1648/7065/files/old_ayurvedic_books_in_telugu_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/carbonate_rocks_formation.pdf
    • https://cdn.shopify.com/s/files/1/0429/7854/1722/files/zelelubakiwagokunuwude.pdf
    • https://cdn.shopify.com/s/files/1/0437/8463/4530/files/43639114485.pdf
    • https://cdn.shopify.com/s/files/1/0431/0371/5489/files/sosevuliso.pdf
    • https://cdn.shopify.com/s/files/1/0429/6369/7820/files/international_commercial_arbitration_law.pdf
    • https://cdn.shopify.com/s/files/1/0432/9095/1848/files/photoshop_free_trial.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7072/files/anatomy_and_physiology_final_exam.pdf
    • https://cdn.shopify.com/s/files/1/0435/8579/8301/files/31692325864.pdf
    • https://cdn.shopify.com/s/files/1/0431/0201/1548/files/alvin_and_the_chipmunks_funkytown.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1032/files/41811529536.pdf
    • https://cdn.shopify.com/s/files/1/0431/1711/7601/files/bacon_selected_essays.pdf
    • https://cdn.shopify.com/s/files/1/0435/9726/7112/files/38606871427.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000573d.bin
5cc4dbdd840301e50d90988a2db83912df57d6dda065cc705debe6a17e204892		 pdf-font-stream PDF embedded font (sfnt) at offset 0x573D 5488 bytes
font_01_sfnt_off000069d0.bin
57cbb9a6c30335b48ee977e777b797a3627a6e47dae13df50445ea31ace44f5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69D0 10608 bytes

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