Malicious PDF — malware analysis report

Static analysis result for SHA-256 130ab1bbb0f3d6a5…

MALICIOUS

PDF

41.9 KB Created: 2020-08-17 04:22:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b54ac3755c575ccd5d34563e3e9e3e9d SHA-1: 70a1c6d0e56f6090972125f7a341e699c11ca1c2 SHA-256: 130ab1bbb0f3d6a50dff4799cb1181a1e504dd39b529e95d8affb8eaf14ddebd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. It also exhibits characteristics of a PDF link farm, with numerous external links, many pointing to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the same suspicious URL and appears to be a lure related to 'bounce dryer sheets mouse deterrent'. The primary attack vector is likely spearphishing attachment, leading to a drive-by compromise via the malicious redirector.

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=bounce+dryer+sheets+mouse+deterrent
    • http://files.derekjenson.com/uploads/1/3/1/8/131857334/243dee949.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6803/1143/files/27435188910.pdf
    • https://cdn.shopify.com/s/files/1/0432/1440/5793/files/havells_ceiling_fan_catalogue_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/7896/5656/files/sivetapulewogosepijutat.pdf
    • https://cdn.shopify.com/s/files/1/0430/9155/8551/files/mododub.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/beowulf_raffel.pdf
    • https://cdn.shopify.com/s/files/1/0436/6663/6953/files/81658990428.pdf
    • https://cdn.shopify.com/s/files/1/0432/5595/5624/files/31404622359.pdf
    • https://cdn.shopify.com/s/files/1/0432/4032/5282/files/94228246066.pdf
    • https://cdn.shopify.com/s/files/1/0440/1774/6070/files/thinking_out_loud_guitar_chords.pdf
    • https://cdn.shopify.com/s/files/1/0436/7079/8489/files/akuntansi_keuangan_lanjutan.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9076/files/51383047394.pdf
    • https://cdn.shopify.com/s/files/1/0431/5509/5708/files/58632829175.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/pompeii_casino_game.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nofalefupipalivudekim.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/application_letter_for_work_immersion_pdf.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_off0000680b.bin
9f346bf5eb3f65bfc061b8a5304611727e60ce53a9deafe26f3fb729dcbb4c94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x680B 5088 bytes
font_01_sfnt_off00007930.bin
b7747eeacae4909fc7cf93d4693aca181c85a31b2b2cbf7d096c53e4b8b29dd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7930 9792 bytes

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