Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbb4bd059da9b453…

MALICIOUS

PDF

39.1 KB Created: 2020-08-09 14:32:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10ed5cedfe68b793e84469c324e4be05 SHA-1: 61f696867b91fb770afde3ca99bd07ceb1ef9f65 SHA-256: fbb4bd059da9b45374c3cef22edeaa9d01ab7b38115b9b3bb41ee84b41620ba1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body and embedded artifacts reveal a large number of external links, many hosted on Shopify, suggesting a link farm or redirection scheme. The primary malicious URL identified is https://ttraff.cc/pify?keyword=cadena+de+coros+cristianos+de+avivamiento+letra+y+acordes+pdf, which likely serves as a gateway to further malicious content.

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.cc/pify?keyword=cadena+de+coros+cristianos+de+avivamiento+letra+y+acordes+pdf
    • http://files.thetlacademy.shop/uploads/1/3/1/3/131384789/dupive-madelubupazape-dezarekinoza.pdf
    • http://nivafan.littleangelscharity.com/uploads/1/3/1/0/131069934/xezezaw_gadixanejomo_vulobol_vevoxetago.pdf
    • http://files.confessionsofaspecialneedsmom.com/uploads/1/3/1/8/131856129/naxubuw.pdf
    • http://files.johnpatrickhunter.com/uploads/1/3/2/7/132712129/4491373.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49726552648.pdf
    • https://cdn.shopify.com/s/files/1/0437/3987/3429/files/ti_36_pro_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/72586909259.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tebagomi.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/vizofelizegoregomol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/degejuwetisagemudow.pdf
    • https://cdn.shopify.com/s/files/1/0432/6850/5766/files/61984925057.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9488/files/gogibet.pdf
    • https://cdn.shopify.com/s/files/1/0434/7409/2198/files/jutupuvagaxoda.pdf
    • https://cdn.shopify.com/s/files/1/0431/4398/7361/files/metal_gear_solid_iso.pdf
    • https://cdn.shopify.com/s/files/1/0428/6827/7404/files/3183353192.pdf
    • https://cdn.shopify.com/s/files/1/0430/8818/3456/files/cellular_pathology_an_introduction_to_techniques_and_applications.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5523/files/45696146155.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000585a.bin
78e8b1821fc17f6a5161d26db7f525c3a77ebc4fced56bc9c8f1f2d79e21c11e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x585A 5368 bytes
font_01_sfnt_off00006a94.bin
101b15026001d228681e63975777722addf8959517b28286dd4074930a1555c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A94 11116 bytes

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