Malicious PDF — malware analysis report

Static analysis result for SHA-256 8427e47954a46071…

MALICIOUS

PDF

50.2 KB Created: 2020-08-21 07:50:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a3b754203d1ad567a7d371dccd9c76e SHA-1: 533509716d25f2dc2965014ddf1a709dbeb67699 SHA-256: 8427e47954a46071987e117c95e77fa59d58a38d75b2876064921df2acc5b9df
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Apple store ios 6'. The presence of many external PDF links suggests a link farm or redirection strategy to distribute 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=apple+store+ios+6
    • http://legitaj.woytowichdesign.com/uploads/1/3/1/0/131070109/tijoke-bijamomigewiju.pdf
    • http://files.artistmarnie.com/uploads/1/3/0/9/130969356/1635133.pdf
    • http://files.theaustintexasteaparty.com/uploads/1/3/1/6/131606393/5850081.pdf
    • http://komexon.frenchtwistboutique.com/uploads/1/3/1/4/131438759/dee331.pdf
    • http://files.angusmaciverbuildingsupplies.co.uk/uploads/1/3/1/4/131453706/4054652.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/3777/6289/files/css_form_submit_button_color.pdf
    • https://cdn.shopify.com/s/files/1/0435/7200/2974/files/gisereluwenigenatovusaxod.pdf
    • https://cdn.shopify.com/s/files/1/0432/4573/2007/files/40643871412.pdf
    • https://cdn.shopify.com/s/files/1/0440/6558/7352/files/57482833047.pdf
    • https://cdn.shopify.com/s/files/1/0430/5249/9098/files/11645918192.pdf
    • https://cdn.shopify.com/s/files/1/0435/5699/5233/files/diary_entry_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4664/files/chakori_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0437/2171/9959/files/15726786676.pdf
    • https://cdn.shopify.com/s/files/1/0435/5656/9249/files/puzeludomomagesus.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/49757047145.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_off000088cd.bin
9abbd256f20929eb63f70db135401dc04fb27732456f777fab8ee533bc589161
pdf-font-stream PDF embedded font (sfnt) at offset 0x88CD 4744 bytes
font_01_sfnt_off00009901.bin
e3831e2afce96727232128e8aea9d4ff53651a891c7bbcc5f9ec4ac45e744efd
pdf-font-stream PDF embedded font (sfnt) at offset 0x9901 10228 bytes