Malicious PDF — malware analysis report

Static analysis result for SHA-256 001971b2dadd7228…

MALICIOUS

PDF

42.8 KB Created: 2020-09-18 12:11:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ca36a448dce23fe373236ae100f2595 SHA-1: fd3e2158884a595ccf8b5c5f03eb503479d12827 SHA-256: 001971b2dadd72288be36487dd40c78c7294d97ea69af4f173e3901fec43d860
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.link/wix?keyword=asp+safety+fundamentals+exam+secrets+study+guide+pdf', suggesting a lure to a malicious site. The presence of a large number of external PDF links further indicates a link farm or SEO poisoning tactic.

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.link/wix?keyword=asp+safety+fundamentals+exam+secrets+study+guide+pdf
    • http://files.emmanuelyork.org/uploads/1/3/0/8/130814633/7424754.pdf
    • http://files.yourangelarmy.com/uploads/1/3/1/6/131606027/kagananojafuv_bisatirokoke.pdf
    • http://xikubid.trishhammondauthor.com/uploads/1/3/1/3/131384021/nokopage-fejuxozu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1222/6206/files/2565861689.pdf
    • https://cdn.shopify.com/s/files/1/0435/6849/6798/files/castlevania_anniversary_trophy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/5353/7685/files/auto_body_repair_tools.pdf
    • https://cdn.shopify.com/s/files/1/0484/9149/5574/files/clash_royale_1.9.2_private_server_apk.pdf
    • https://51c83a99-5fdc-444c-ba05-f7aff4425f60.filesusr.com/ugd/f2ef67_e494a92c424347baaff23ef83d772162.pdf?index=true
    • https://1a4b83ba-ab8b-41a6-b0cb-72a89d30281c.filesusr.com/ugd/46a5ae_30873a820dd34f3dafa4f0679bfdd84d.pdf?index=true
    • https://af7f22f3-0b21-4af9-9825-5f0a9ad10b9d.filesusr.com/ugd/d86e81_1f66576a6b5c4d5a801487a6f5e35cba.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/7039/8368/files/binary_search_tree_algorithm.pdf
    • https://cdn.shopify.com/s/files/1/0434/9470/3270/files/bootstrap_4_templates_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/5994/4353/files/bibliotheque_mathematique_et_informatique_udem_adresse.pdf
    • https://cdn.shopify.com/s/files/1/0434/4404/3943/files/lolokajokafowufewutizazon.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_off000067fe.bin
ed6f2bddd16dd533cf97c570b2e5296f4981dec52fb9b257b7ac4f05541bf265		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67FE 5636 bytes
font_01_sfnt_off00007b2b.bin
5bab1436329ef4a523fc4797f9bd089b6e3c350ab21f5782f41e928720233fa4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B2B 10152 bytes

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