Malicious PDF — malware analysis report

Static analysis result for SHA-256 90395231702ed271…

MALICIOUS

PDF

54.6 KB Created: 2020-08-06 21:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d74eb74699b1b8692d66a9f82c0fcdad SHA-1: e4f3cfe05abfa6ca28311a8b28b5eb32768c51d7 SHA-256: 90395231702ed271b015a32a6d3558684ca9264004deb2758400568bce521ffd
152 Risk Score

Malware Insights

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

This PDF 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 pointing to a redirector service at ttraff.com, which is likely used to obscure the final malicious destination. The presence of numerous PDF links also suggests a link farm, a common tactic for SEO poisoning or distributing 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.com/pify?keyword=revenue+management+im+hotel+pdf
    • http://files.bzdickstudio.com/uploads/1/3/1/6/131606257/tunurepelibep.pdf
    • http://files.therapeutichealingandwellness.com/uploads/1/3/1/4/131454549/3142013.pdf
    • http://files.yukonriverdesigns.com/uploads/1/3/1/3/131382808/benisede-surakevilakolem-kakegoniretu-kituvifejo.pdf
    • http://files.alissaroca.com/uploads/1/3/1/3/131384777/wuluwute.pdf
    • https://cdn.shopify.com/s/files/1/0437/7804/8162/files/resumen_de_alcanos_alquenos_y_alquinos.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1376/files/kugutaturid.pdf
    • https://cdn.shopify.com/s/files/1/0429/8165/4687/files/51920803324.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/79086372433.pdf
    • https://cdn.shopify.com/s/files/1/0439/2134/2619/files/didavaka.pdf
    • https://cdn.shopify.com/s/files/1/0433/6690/8054/files/kefatemekitozewepagovila.pdf
    • https://cdn.shopify.com/s/files/1/0427/8904/4383/files/makagogotibizisosipobemum.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/53020728549.pdf
    • https://cdn.shopify.com/s/files/1/0431/5991/2610/files/case_hardening_heat_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/duzezitib.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zebegevuda.pdf
    • https://cdn.shopify.com/s/files/1/0434/6960/2978/files/61453144965.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_off0000987d.bin
ae6564a263b220a2894b145a4449bb25ef4e4d58ba6facc480154cf845c8e9df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x987D 5248 bytes
font_01_sfnt_off0000aa47.bin
4a4435c6709d8ac4ffb84684d523c5a0cbd7c310205664bee781b49c71f2c059		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA47 10308 bytes

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