Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc394146fee6e705…

MALICIOUS

PDF

43.2 KB Created: 2020-09-01 01:21:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d9535bc8e15f3fbb73ef723fd7cce96 SHA-1: fa91d4ab21a6120e692b9199c3a80c6ce4746d2f SHA-256: fc394146fee6e705921f4f2b940a767a6d96a9e21b2d231ed2468fe5f48e5d8a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a high number of embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.ru/wix?keyword=africa+map+political+pdf. While many other links point to benign Shopify URLs, the presence of the malicious redirector and the ML classifier's high confidence score suggest a malicious intent, likely to redirect users to a phishing or malware-hosting site.

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=africa+map+political+pdf
    • https://cdn.shopify.com/s/files/1/0433/6291/0376/files/counseling_and_therapy_skills_martin.pdf
    • https://cdn.shopify.com/s/files/1/0428/9550/7622/files/raxet.pdf
    • https://cdn.shopify.com/s/files/1/0429/5812/7270/files/vabufukitagitam.pdf
    • https://cdn.shopify.com/s/files/1/0437/6703/8109/files/98143595224.pdf
    • https://cdn.shopify.com/s/files/1/0435/5047/4399/files/osteoarthritis_adalah_usu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2174/6847/files/19642305074.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8428/files/kujuwidutizadis.pdf
    • https://cdn.shopify.com/s/files/1/0432/8059/7152/files/creative_writing_grade_11_module.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xajubebajodefemun.pdf
    • https://cdn.shopify.com/s/files/1/0450/6091/5350/files/97336111030.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/tizawukixaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/2101/5967/files/39976678763.pdf
    • https://static.usrfiles.com/ugd/b8c837_ba8772f2c4e049fcba55756e780f180c.pdf
    • https://static.usrfiles.com/ugd/3e0cb9_31c65303066241eab60eb2a821ee4e01.pdf
    • https://static.usrfiles.com/ugd/01bc73_b4f01443f896447e856b15c29d5b87b0.pdf
    • https://static.usrfiles.com/ugd/bae363_c4001738259a4bedb16238d6c5731579.pdf
    • https://static.usrfiles.com/ugd/760101_ac201f0f5fb54dffa7ffe6e53a9bbabc.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_off00006b85.bin
20af81ad67342381cdba1161264f3c2b109102140de2adf29dc89ee510272f5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B85 5112 bytes
font_01_sfnt_off00007cd5.bin
508c3eccf809b55ee21dd6fc76ec491c50e2d0c0f0dad4efa1def540715bbc2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD5 10332 bytes

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