Malicious PDF — malware analysis report

Static analysis result for SHA-256 089974e8c0550eec…

MALICIOUS

PDF

49.5 KB Created: 2020-08-17 11:10:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 488f3609de4e3bf6c7ab6a1cfbdae452 SHA-1: a489cddc1ea3320756cf9ed8a82cf3da24e24908 SHA-256: 089974e8c0550eec1e41b6bf2610915f9f101831e131138030ceae92d9ca07fb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links, many of which are algorithmically generated and point to a link farm designed to host malicious content. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.com/pify?keyword=powerpoint+newsletter+template', which likely serves as a lure. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs suggests an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.com/pify?keyword=powerpoint+newsletter+template
    • http://files.mediaartsperformance.com/uploads/1/3/1/4/131406140/kidodoselaburobegi.pdf
    • http://fekaxes.kemptvilleacademyofmartialarts.com/uploads/1/3/1/4/131406717/2499373.pdf
    • http://files.elementssalononline.com/uploads/1/3/1/8/131856124/b65ef7721359b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7746/7288/files/mivowabizofevemutekupoxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4950/0328/files/numakavef.pdf
    • https://cdn.shopify.com/s/files/1/0429/7929/5385/files/sasusoruzojedewojitapo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/ziwejogonazanadaxovetawup.pdf
    • https://cdn.shopify.com/s/files/1/0437/0612/2393/files/20057142551.pdf
    • https://cdn.shopify.com/s/files/1/0431/3032/3101/files/gisenekodug.pdf
    • https://cdn.shopify.com/s/files/1/0429/5367/0822/files/cae_listening_part_1.pdf
    • https://cdn.shopify.com/s/files/1/0434/1720/6946/files/sugefizevoxomurakajukedif.pdf
    • https://cdn.shopify.com/s/files/1/0438/2176/0672/files/50816900273.pdf
    • https://cdn.shopify.com/s/files/1/0428/6103/5686/files/pintura_surrealista.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/37741658126.pdf
    • https://cdn.shopify.com/s/files/1/0432/3291/9720/files/xokelelokimoxubu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/escherichia_coli_scielo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0636/9697/files/cartoon_character_development.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/24418364025.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_off0000851b.bin
ca019c931c6825cf1ca21ec032a9bd9b9587af59f9819f43b53815bbf2ee28e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x851B 5056 bytes
font_01_sfnt_off0000963e.bin
17439a8e54df0b03f746595b507e2b29e37d74aa839c8ea20a5b0cc7391d9c80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x963E 10044 bytes

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