Malicious PDF — malware analysis report

Static analysis result for SHA-256 117cd3479f8c4add…

MALICIOUS

PDF

41.7 KB Created: 2020-08-29 17:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a303307d7a9d0c2baf8402bc369aa0ab SHA-1: 8237ae3145e6952cd72703bbede6cd8b6e71f89f SHA-256: 117cd3479f8c4adda016b17e54fbe3ab967f8a671bfa2abe407913ca2d0f958e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to contain keywords related to a game, likely as a lure. The presence of a malicious redirector suggests an attempt to lead the user to a malicious site, potentially for further exploitation or credential harvesting.

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=subnautica+prawn+suit+drill+arm+location
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7092/2655/files/54446393348.pdf
    • https://cdn.shopify.com/s/files/1/0435/0319/0181/files/second_hand_mobile_app.pdf
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/lenupesutemaje.pdf
    • https://cdn.shopify.com/s/files/1/0436/1512/5661/files/73803418027.pdf
    • https://cdn.shopify.com/s/files/1/0431/3179/7668/files/78351644422.pdf
    • https://cdn.shopify.com/s/files/1/0460/9749/8276/files/choose_the_best_answer_for_each_question.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/42688972333.pdf
    • https://cdn.shopify.com/s/files/1/0438/1832/0029/files/cubase_5_software_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0440/1764/7766/files/fundamentals_of_microbiology_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/3920/3229/files/smart_tv_powered_by_android.pdf
    • https://cdn.shopify.com/s/files/1/0436/5382/4677/files/65064596811.pdf
    • https://cdn.shopify.com/s/files/1/0438/6023/0294/files/talemoju.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/nuweruzuzuvewidapisogafo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6533/6217/files/captivate_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/3449/9493/files/dadufolepoturipurubuxudun.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/tigozirexotozojujapa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mekokagowofulagifofid.pdf
    • https://cdn.shopify.com/s/files/1/0431/1806/7866/files/encode_file_to_base64_javascript.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_off00004b2f.bin
88d676a4226a7f7e196e2008374c04cc292733096a2a1312554edb3cecc82c79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B2F 7868 bytes
font_01_sfnt_off000064f6.bin
d93bb292cd43431b8fdb51ecb5a2f884e59b5f1d300fc9b82183e3523650ea5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64F6 5556 bytes
font_02_sfnt_off000077c0.bin
4e5fa72b8af44509e0c2471d692b2ab3f4f5fb3344487ec48fa5d9cd9ba14504		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C0 9836 bytes

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