Malicious PDF — malware analysis report

Static analysis result for SHA-256 155cd1c6e5fe28f8…

MALICIOUS

PDF

45.8 KB Created: 2020-08-04 22:16:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40a45f415e2c76d38d14f88aec19a289 SHA-1: 8faace09ee8d652eab5b5f1a06f48e89912b51bf SHA-256: 155cd1c6e5fe28f865e5c4d88f718ca6edb520adc005cd7e2cc51e853ac9c425
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, suggesting a link farm or SEO manipulation tactic. One prominent link, 'https://ttraff.com/pify?keyword=arifureta+light+novel+vol+1+pdf', is flagged as a malicious redirector, indicating an attempt to lead users to harmful content. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent.

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=arifureta+light+novel+vol+1+pdf
    • http://files.markellscloset.com/uploads/1/3/2/7/132741555/tiladolafijujazo.pdf
    • http://files.manestreethaircompany.com/uploads/1/3/1/4/131409274/b41fbfe.pdf
    • http://files.biblebonanza.com/uploads/1/3/1/3/131381799/lejejeb_nimiki_fususiwonoj_pitip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0355/1645/files/lavuvoje.pdf
    • https://cdn.shopify.com/s/files/1/0434/5610/2565/files/52528295287.pdf
    • https://cdn.shopify.com/s/files/1/0434/4361/7958/files/moriencia_augusto_roa_bastos.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0971/files/gaxafoxim.pdf
    • https://cdn.shopify.com/s/files/1/0430/3234/6773/files/xuvujilomipuzijupejen.pdf
    • https://cdn.shopify.com/s/files/1/0432/8646/2620/files/96030479446.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dadimutixiwukigojubiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/7401/0782/files/84532328574.pdf
    • https://cdn.shopify.com/s/files/1/0439/0522/0776/files/interventional_radiology_cardiology.pdf
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/75707932129.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0850/files/zomagipizipasakofoso.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_off00005f7a.bin
1bc964cc54542c43e24c0982c17c11614cff6bcd749eb61f5deb193eccfa1a77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7A 6372 bytes
font_01_sfnt_off00007560.bin
728fd7edee7354188212b48f94852351e8ef8284ab6dd7b7fc52ee9dc20d9fd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7560 5228 bytes
font_02_sfnt_off0000872f.bin
d118d9227a036950c70629b14e48e901e18029779f7dd70181bec264f6da4843		 pdf-font-stream PDF embedded font (sfnt) at offset 0x872F 10256 bytes

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