Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c30ccb46745bc0a…

MALICIOUS

PDF

76.2 KB Created: 2020-08-24 23:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 369a114ec76e9835d29969e18568e0b2 SHA-1: 93deb60e04747a823094f6fce8264f41f1d4732c SHA-256: 3c30ccb46745bc0af70dc2477d2e3b3d718337c78880a9675423373c8cade2df
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm. This suggests the primary purpose is to lure users to malicious sites. No scripts were extracted, limiting the analysis of specific execution behaviors.

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/pify?keyword=chartered+accountant+logo
    • http://files.victordelestre.com/uploads/1/3/1/4/131452838/fipirazuzoxiwupol.pdf
    • http://kesom.unilifeenglish.com/uploads/1/3/2/6/132683080/bijolaperupadu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/deredipumajodumegeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3852/files/raxoxunosexorepomakor.pdf
    • https://cdn.shopify.com/s/files/1/0434/7992/4893/files/dakovejizutelulidogu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9201/6280/files/kikibigejibize.pdf
    • https://cdn.shopify.com/s/files/1/0450/3601/1678/files/illustrative_mathematics_algebra_1_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0438/6842/2309/files/18215344958.pdf
    • https://cdn.shopify.com/s/files/1/0435/4641/1167/files/artistic_photoshop_actions_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5671/files/dizomekozaxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/l_anthropologie_sociale_et_culturelle.pdf
    • https://cdn.shopify.com/s/files/1/0431/5106/5243/files/guwitalebape.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/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca2b.bin
a4f58cf1bcfe42e893018f1a8872e749e185efda26d857bc828ce7285dac9dbf
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA2B 4880 bytes
font_01_sfnt_off0000dab9.bin
fabbfabe26456ba67bf52c19c54066deaf73fc9d54adbe4b85220548ab3b6184
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB9 10952 bytes
font_02_sfnt_off00010022.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10022 16164 bytes
font_03_sfnt_off00011537.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11537 4324 bytes