Malicious PDF — malware analysis report

Static analysis result for SHA-256 1304e4b0b81b58e5…

MALICIOUS

PDF

42.5 KB Created: 2020-08-18 14:22:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 518fdd76b5cde65782ad196a966d3e96 SHA-1: c2ec80060b87454d60734ee9ac5e3bd092d9402e SHA-256: 1304e4b0b81b58e5e333095941f74a3ca4f28ccd8160b14caa14cb907bee9a93
194 Risk Score

Malware Insights

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

The PDF contains a lure for an advance-fee scam, specifically offering free designer clothing, which redirects to a malicious URL. The document body, though partially garbled, contains the primary lure URL and references to other PDF files hosted on various domains, suggesting a link farm used for SEO poisoning or distributing further malicious content. The ML classifier strongly indicated maliciousness, and the presence of numerous external links points to a campaign designed to drive traffic to malicious sites.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=marvelous+designer+cloth+free
    • http://files.newleaforganizingllc.com/uploads/1/3/1/8/131857071/6418065.pdf
    • http://files.angelocaciola.com/uploads/1/3/0/8/130814596/9cc4832e05aa738.pdf
    • http://files.eklaboutique.com/uploads/1/3/1/3/131378835/1955927.pdf
    • http://files.anjellyschick.com/uploads/1/3/0/8/130815026/xixexuwokimezu-fuboxoz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8522/5372/files/datoratinatawugumudomu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6529/5526/files/81375418061.pdf
    • https://cdn.shopify.com/s/files/1/0430/4922/2298/files/68386426061.pdf
    • https://cdn.shopify.com/s/files/1/0434/4663/2615/files/princess_bubblegum_season_8.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5312/files/72360637092.pdf
    • https://cdn.shopify.com/s/files/1/0431/9808/7328/files/52312735695.pdf
    • https://cdn.shopify.com/s/files/1/0430/7307/7409/files/pogetowe.pdf
    • https://cdn.shopify.com/s/files/1/0437/5959/9765/files/14683943085.pdf
    • https://cdn.shopify.com/s/files/1/0430/8415/2986/files/vuxegi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2317/8656/files/32048853430.pdf
    • https://cdn.shopify.com/s/files/1/0428/5480/9756/files/63757888459.pdf
    • https://cdn.shopify.com/s/files/1/0429/5986/3961/files/69329409162.pdf
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/moziper.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_off00006614.bin
322aafc2b4fdc026fca6381af2b07b589e39df63e8d856ea1a8e283d3a9dee81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6614 5348 bytes
font_01_sfnt_off0000784b.bin
a94a3d92df1ff6a589a0aa77de7810aa001ea5c192061c411c13b7810a74e1da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x784B 10840 bytes

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