Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ce8a83e1fa08fed…

MALICIOUS

PDF

35.8 KB Created: 2020-08-19 01:46:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08a67c12d79278667e08a8d8bc9e1213 SHA-1: 66cab9a2cb4073fa1cb6a34a82546e339754e124 SHA-256: 3ce8a83e1fa08fedb9c4009d61e7926e04234326c4df55b032938095fea9621a
152 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and heuristics indicate it is a malicious redirector and part of a link farm. The document body contains a URL that redirects to a malicious domain, likely intended to lure users to malicious content or further compromise.

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=off+road+buggy+car+racing+apk
    • http://files.mrs-stafford.com/uploads/1/3/0/9/130969511/5288718.pdf
    • http://files.lodgevintage.com/uploads/1/3/1/4/131483249/xaxoke_fipovevof_temik_wekipar.pdf
    • http://files.thesunflowerkids.org/uploads/1/3/0/8/130813366/gegeboperes_vugon_livaduvewaz.pdf
    • http://soretaj.gn2gn.com/uploads/1/3/0/8/130873995/0b166b.pdf
    • https://cdn.shopify.com/s/files/1/0433/8548/7516/files/garububakabepivez.pdf
    • https://cdn.shopify.com/s/files/1/0434/0000/3747/files/tubasupefagin.pdf
    • https://cdn.shopify.com/s/files/1/0437/9561/1810/files/29285564638.pdf
    • https://cdn.shopify.com/s/files/1/0435/7426/3963/files/2375113426.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5953/files/35311996255.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70354855800.pdf
    • https://cdn.shopify.com/s/files/1/0428/4894/4295/files/chakrasamvara_mantra.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zikoraj.pdf
    • https://cdn.shopify.com/s/files/1/0431/5345/7320/files/86849487512.pdf
    • https://cdn.shopify.com/s/files/1/0429/4764/1510/files/66673643898.pdf
    • https://cdn.shopify.com/s/files/1/0431/3032/3095/files/brownian_motion_and_stochastic_calculus_karatzas_shreve.pdf
    • https://cdn.shopify.com/s/files/1/0430/8454/6209/files/pefurofisekiti.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5682/files/audi_q5_2018_mmi_manual.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_off00004e3b.bin
1faf73e5ac886916daede36e05d6949535e760801024e53a05736903dd6afdd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E3B 5448 bytes
font_01_sfnt_off000060d4.bin
38c05abd6314c3001af3b0f79c063d366229041951ae7b67d1f56aa2be408df7
pdf-font-stream PDF embedded font (sfnt) at offset 0x60D4 9800 bytes