Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e8855b8a4c21ab5…

MALICIOUS

PDF

32.6 KB Created: 2020-08-27 21:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c961542b0aa6a4e16c68e2bce6f0b606 SHA-1: 3850164fd45eb7ab4faeb900f662cb4694ca3903 SHA-256: 2e8855b8a4c21ab5e17da10e7e513f135287205f7a865a05f28db9455589d735
152 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users into clicking on potentially harmful content. The document body, though heavily obfuscated, contains the target URL and references to other PDFs hosted on Shopify, suggesting a link farm or redirection scheme. The ML classifier strongly indicated maliciousness, and the presence of multiple external links points to a phishing or redirection attack.

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=airport+service+manual
    • http://wafogo.custercadet.com/uploads/1/3/0/8/130874426/c556d2bc7d14e.pdf
    • http://gogimase.hairtieandpecanpie.com/uploads/1/3/1/3/131384778/7313d8c666f88.pdf
    • https://cdn.shopify.com/s/files/1/0437/6012/4061/files/9798196167.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/dcuo_tier_8_vendor.pdf
    • https://cdn.shopify.com/s/files/1/0431/7931/1253/files/17942176076.pdf
    • https://cdn.shopify.com/s/files/1/0430/9526/1333/files/86935478768.pdf
    • https://cdn.shopify.com/s/files/1/0437/0586/0248/files/91140939695.pdf
    • https://cdn.shopify.com/s/files/1/0436/1617/4237/files/48453506068.pdf
    • https://cdn.shopify.com/s/files/1/0432/9956/9829/files/analog_trip_in_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51191810805.pdf
    • https://cdn.shopify.com/s/files/1/0429/7854/1722/files/dobijal.pdf
    • https://cdn.shopify.com/s/files/1/0429/5272/0543/files/figavalefufodogiwukak.pdf
    • https://cdn.shopify.com/s/files/1/0430/4034/2169/files/esc_guideline_heart_failure_2016.pdf
    • https://cdn.shopify.com/s/files/1/0428/3754/1031/files/zesumazekamoron.pdf
    • https://cdn.shopify.com/s/files/1/0434/6865/2697/files/race_car_aerodynamics.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_off000043dc.bin
2f2067ed4dda30cd71bb55d0923011166ae6bf320425cbcb7f6df8b9be12c3c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x43DC 5128 bytes
font_01_sfnt_off00005534.bin
67b234059880b0d706cbe828e8e78a059b378dc53458afe923bf19114edbe3a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5534 9548 bytes