Malicious PDF — malware analysis report

Static analysis result for SHA-256 0751f23cc79f6689…

MALICIOUS

PDF

40.0 KB Created: 2020-08-25 00:25:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcaf6b84b94dfa2fa2ab6a4e9377088f SHA-1: 0abb21e21de032c84bb082bf48085995f3ac0e2f SHA-256: 0751f23cc79f6689a236e62a9eba2b69421bcf346ab2c1785a1aa670864b905d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.com/pify?keyword=answering+the+phone+at+work+script, which likely leads to a malicious payload. The document's content and structure strongly suggest it is part of a phishing campaign designed to redirect users to harmful sites.

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.com/pify?keyword=answering+the+phone+at+work+script
    • http://files.alliedrenew.com/uploads/1/3/0/8/130814169/944229b2.pdf
    • http://nodumo.columbia125.org/uploads/1/3/0/8/130874064/kumomikivomebu_berosixed_jinutox_pibigam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7025/9357/files/27308015054.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/womosoravitixugefiwil.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/62841201178.pdf
    • https://cdn.shopify.com/s/files/1/0463/5767/6193/files/rofofaxo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9751/2354/files/90992541399.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4333/files/doxexarav.pdf
    • https://cdn.shopify.com/s/files/1/0439/0912/0152/files/39493499746.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4464/files/astronomy_today_mcmillan.pdf
    • https://cdn.shopify.com/s/files/1/0433/5792/9621/files/80917083121.pdf
    • https://cdn.shopify.com/s/files/1/0438/2595/4973/files/vatamunerarik.pdf
    • https://cdn.shopify.com/s/files/1/0437/1975/3879/files/37237946303.pdf
    • https://cdn.shopify.com/s/files/1/0440/7043/7016/files/12299355474.pdf
    • https://cdn.shopify.com/s/files/1/0434/9624/3364/files/wosofawitavubolotejugabi.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_off00005f18.bin
5acc43a1ad314fddf8de1d555d44568b04ee216bf5e71169a15c639172946b9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F18 5308 bytes
font_01_sfnt_off0000712d.bin
9ee88abe5c0de8a74b505ec360087b413a19db528b1f6b9f6c4e8ece1872ede7
pdf-font-stream PDF embedded font (sfnt) at offset 0x712D 10000 bytes