Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e7f6709d239cb1d…

MALICIOUS

PDF

47.5 KB Created: 2020-08-09 03:19:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e608fc8ef966980b5c44293953416ed5 SHA-1: 9b1d887c492ac070535e9b9857ba070c98b0b6dc SHA-256: 6e7f6709d239cb1d16d137a19c0e8203a27e4be1bc643055e25ad1affaf30fce
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits malicious behavior by embedding a large number of external links, many of which point to a redirector infrastructure. The document body contains obfuscated text and references to URLs, suggesting an attempt to manipulate search engine results or direct users to malicious content. The presence of a password-protected archive lure indicates a common tactic to bypass gateway security. While no scripts were directly extracted, the overall structure and link farm behavior strongly suggest a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/pify?keyword=que+es+calidad+de+vida+en+el+trabajo+pdf
    • http://files.artisansatlarge.com/uploads/1/3/0/7/130775934/255a2.pdf
    • http://files.rightchoicesurrogacy.com/uploads/1/3/0/8/130813668/a20d4.pdf
    • http://kijitem.claireblackall.com/uploads/1/3/0/9/130969723/vowufekan.pdf
    • http://files.herbertpauls.com/uploads/1/3/2/7/132712129/2c2e158.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tozonolemudafolafoxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2466/2173/files/68199796472.pdf
    • https://cdn.shopify.com/s/files/1/0428/8600/4899/files/visixobifirepepebozejabe.pdf
    • https://cdn.shopify.com/s/files/1/0431/9405/6861/files/les_animaux_fantastiques_les_crimes_de_grindelwald_livre_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0431/1567/5815/files/gunstar_heroes_rom.pdf
    • https://cdn.shopify.com/s/files/1/0435/4709/9287/files/57723939913.pdf
    • https://cdn.shopify.com/s/files/1/0431/8268/6367/files/rodrigo_silva_o_ceticismo_da_f.pdf
    • https://cdn.shopify.com/s/files/1/0434/5243/2537/files/grohe_angle_valve_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0428/9354/1532/files/goniludusefogojuvitifeb.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/78330883491.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9381/files/amplificateur_de_puissance_exercices_corrigs.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/samilunudivero.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/jowowexevorirefonigasadep.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_off000069ff.bin
7e79d8b80140b823a94e6cd61532417fd0c57183e18ab8fb6b4b345639c34d44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69FF 5368 bytes
font_01_sfnt_off00007c4f.bin
591943df26bdced1544dfd2dfe8986ff4be71ba46fdff1e81f6ca22476bc3289		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4F 11276 bytes
font_02_sfnt_off0000a0f3.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0F3 4324 bytes

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