Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b6136c49943dd05…

MALICIOUS

PDF

46.6 KB Created: 2020-08-26 13:28:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8da1927074a941f14aa4fafc1ec348d4 SHA-1: 70bde48882b11b2daa922511bdf545d3c894c6f8 SHA-256: 5b6136c49943dd0562517ad2ee0dd6e01a1e6bad3d52fa2ed307c2351a40603a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to online gaming and the URL https://ttraff.cc/pify?keyword=osrs+ironman+money+making+f2p, suggesting a lure to a malicious site. The presence of a link farm heuristic further supports the malicious intent of directing users to external, potentially harmful, content.

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=osrs+ironman+money+making+f2p
    • http://files.elkfordchamber.ca/uploads/1/3/0/7/130738593/jabejelidaduri-zexij-sivupix-laxexakodobipi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/1052432088.pdf
    • https://cdn.shopify.com/s/files/1/0432/3321/4621/files/renekipuvinogagefutoki.pdf
    • https://cdn.shopify.com/s/files/1/0428/7073/5014/files/17848688464.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/54049302947.pdf
    • https://cdn.shopify.com/s/files/1/0432/1338/9992/files/allez_vous_en_sur_les_places_partition.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xasojikunu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3556/4964/files/impossible_quiz_answers_level_26.pdf
    • https://cdn.shopify.com/s/files/1/0431/5080/3099/files/83371367338.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/joint_venture_accounting_problems_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rasebiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0160/1444/files/zizitizidajixopugenaxig.pdf
    • https://cdn.shopify.com/s/files/1/0429/0953/2316/files/nostra_aetate_hrvatski.pdf
    • https://cdn.shopify.com/s/files/1/0434/7160/1817/files/11080823156.pdf
    • https://cdn.shopify.com/s/files/1/0433/2971/6374/files/powofisebesugumebokasuw.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_off000077cd.bin
8668cb942ae848da8f9068be3a2d53d26f7643dc0e5b39baa97a217d2c4c2ed5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77CD 5516 bytes
font_01_sfnt_off00008a8e.bin
e4d23eb48326b4bab557e92f1687596e7c7279800c9cb6f3f7b8c0f227c14c4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A8E 10396 bytes

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