Malicious PDF — malware analysis report

Static analysis result for SHA-256 7627b0633ecb75d8…

MALICIOUS

PDF

40.7 KB Created: 2020-08-17 16:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c322fa4018e1e74dd22c3e2bf2e11822 SHA-1: a1de37dae7f6348bde3bb94156b295e672f81e47 SHA-256: 7627b0633ecb75d819e846273d00633323ff3636560e9c759b748e9d5454bd10
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Gta chinatown cheat codes android' and a URL, suggesting a lure to trick users into clicking the malicious link. The presence of numerous external PDF links further indicates a link farm, a common tactic for SEO poisoning and traffic redirection.

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=gta+chinatown+cheat+codes+android
    • http://rurazo.zoneadvisory.com/uploads/1/3/0/8/130813669/finom-tuzisogepixozoj-dezibaxepib.pdf
    • http://lujojet.badcats.smifh.com/uploads/1/3/0/9/130969656/gipogizopolipav_verakudikunofa.pdf
    • http://files.bayanhajj.com/uploads/1/3/1/4/131406893/ginexopararaw_riwopelu_linezokezew.pdf
    • http://kemifas.judyadhdcoaching.com/uploads/1/3/1/4/131409090/1419329.pdf
    • http://lomaxa.winshipart.com/uploads/1/3/1/8/131871899/90f4388.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/15137997142.pdf
    • https://cdn.shopify.com/s/files/1/0432/4088/2343/files/vodevev.pdf
    • https://cdn.shopify.com/s/files/1/0429/2621/1238/files/59398881554.pdf
    • https://cdn.shopify.com/s/files/1/0438/2916/6242/files/reverse_linked_list_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0433/7152/8344/files/muvimaparareges.pdf
    • https://cdn.shopify.com/s/files/1/0434/3509/8264/files/pagawumijigikasun.pdf
    • https://cdn.shopify.com/s/files/1/0429/3555/0118/files/fidis.pdf
    • https://cdn.shopify.com/s/files/1/0432/6991/4782/files/75485064172.pdf
    • https://cdn.shopify.com/s/files/1/0434/4853/3142/files/35372258950.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005767.bin
5c96fb03bb49ce310611ea296916074e8a2f32751341bddc10df334b934913d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5767 5116 bytes
font_01_sfnt_off000068d7.bin
e28a1745330cf80f68e740933079f824b1af2fe36a57263d12eec0a503cd34f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x68D7 14808 bytes