Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee39f3b5c2e3b0d…

MALICIOUS

PDF

49.7 KB Created: 2020-08-10 02:50:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72e16332d7fdab5f411d50234310a431 SHA-1: c0d97b8bc58e46d06e907533a1cd297de941d8d0 SHA-256: 0ee39f3b5c2e3b0dc8e2cda0611af344bd49e59a468ef96f85c3af5df3286397
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including a primary redirector to 'ttraff.cc' which is flagged as malicious. The document body, though heavily obfuscated, contains text related to 'Curriculum vitae' and the malicious URL, suggesting a lure. The presence of a large number of external PDF links points towards a link farm strategy, likely to obscure the ultimate malicious destination or for SEO manipulation.

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=curriculum+vitae+formato+pdf+editable
    • http://files.nataliemcgreal.com/uploads/1/3/0/8/130814021/e7dfe1f.pdf
    • http://files.mclcrd.org/uploads/1/3/1/8/131856815/8da2c192458c7d.pdf
    • http://lodon.sisiholisticbeauty.com/uploads/1/3/0/8/130814238/vozupad_xanumixivuvu_ladasivit.pdf
    • http://xilosid.eclectic-shamanism.com/uploads/1/3/0/9/130969060/66a957a8b6e1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/5658/5114/files/xevewowagizozomovegabona.pdf
    • https://cdn.shopify.com/s/files/1/0432/4845/1739/files/pujubipalutofu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/40247506924.pdf
    • https://cdn.shopify.com/s/files/1/0435/6807/0815/files/express_js_tutorial_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8559/4775/files/84618444795.pdf
    • https://cdn.shopify.com/s/files/1/0432/6775/2100/files/gufuvitibere.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/android_phone_secret_codes.pdf
    • https://cdn.shopify.com/s/files/1/0434/9765/2376/files/cours_d_anglais_pour_le_debutant.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/volume_of_prisms_and_pyramids_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0427/6423/9014/files/chaotic_sword_god_novel.pdf
    • https://cdn.shopify.com/s/files/1/0435/6302/4542/files/41384358784.pdf
    • https://cdn.shopify.com/s/files/1/0439/1672/2344/files/remedonosamekateliwawebu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4868/1120/files/fuvur.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/gipijuvilokafumiviwev.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007622.bin
b6476bf334dfcc2aec10c95588469793dc6736fd375a444382ceb154bf2c590f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7622 5124 bytes
font_01_sfnt_off00008792.bin
24f31667734231ec36bec0fe2364bd29cc580468c0ffa348c5c6562f179652a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8792 10504 bytes
font_02_sfnt_off0000ab7e.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB7E 4324 bytes

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