Malicious PDF — malware analysis report

Static analysis result for SHA-256 8689b7c3f0b7fe56…

MALICIOUS

PDF

41.3 KB Created: 2020-08-14 10:39:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d723ff7716ab39be0ab6692fd14e1711 SHA-1: 67ec1c5353bb67292a9c80b53f99c1c3eea2d1cd SHA-256: 8689b7c3f0b7fe56dab1dd6ca41dcf3502a72fe12d20cf073e00229c06311c2f
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Angry birds transformers telepods qr codes hack', suggesting a lure to trick users into clicking malicious links. The ML classifier also strongly indicated maliciousness.

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=angry+birds+transformers+telepods+qr+codes+hack
    • http://luruxaj.almost-local.com/uploads/1/3/1/1/131163599/2989105.pdf
    • http://files.drmamouzette.com/uploads/1/3/1/3/131379894/nijomeluramomik_puvivuriko.pdf
    • http://zesido.ortreport.com/uploads/1/3/1/8/131871674/dolovedojilujavokeko.pdf
    • http://basadimo.stalbansyracuse.org/uploads/1/3/1/4/131409090/5d0ff521481.pdf
    • http://jewabusuw.topqueensbeautythrone.com/uploads/1/3/1/4/131454057/7775087.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2122/files/30683131278.pdf
    • https://cdn.shopify.com/s/files/1/0430/8267/8433/files/lufuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/3277/1750/files/bunarolazuwozaxuzaxufu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4440/5397/files/nonixeworopevovekejabe.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/17073906289.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/51373747348.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/purulasep.pdf
    • https://cdn.shopify.com/s/files/1/0435/8501/1869/files/xikulesujamirasa.pdf
    • https://cdn.shopify.com/s/files/1/0438/3028/0352/files/58307333227.pdf
    • https://cdn.shopify.com/s/files/1/0433/5340/7646/files/93860321489.pdf
    • https://cdn.shopify.com/s/files/1/0430/9460/5975/files/26500481729.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_off0000619b.bin
8b5a1aa3cb9e78caefa23a9f094095f242df51a4fb6ae090f48d99f277479d60
pdf-font-stream PDF embedded font (sfnt) at offset 0x619B 5988 bytes
font_01_sfnt_off000075cb.bin
884f4cd28a2015ede477a569d26992b25c88f4063e6bc3a4ce7183ed5b69eb42
pdf-font-stream PDF embedded font (sfnt) at offset 0x75CB 9964 bytes