Malicious PDF — malware analysis report

Static analysis result for SHA-256 77530ce2882970dc…

MALICIOUS

PDF

45.3 KB Created: 2020-08-08 21:49:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bae5b47ef31a1121ccd541fce6a24dd SHA-1: 81f8e40941aa85047e526b484a6aab05c9cc8dcc SHA-256: 77530ce2882970dc2701900a920dd3d6febe871909513276bc476399900ee9b6
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, including a primary redirector to 'https://ttraff.com/pify?keyword=git+commands+for+windows+pdf', which is flagged as malicious. The document body, though heavily obfuscated, contains references to the same URL and appears to be a lure for users interested in 'git commands for windows'. The presence of multiple external PDF links suggests an attempt to distribute further malicious content or engage in SEO manipulation for malicious purposes.

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=git+commands+for+windows+pdf
    • http://files.egelstonmaynard.com/uploads/1/3/1/0/131070173/0dab1b.pdf
    • http://files.jamiefellows.com/uploads/1/3/0/8/130814226/1616173.pdf
    • http://repozewe.815lashed.com/uploads/1/3/0/7/130775727/8773436.pdf
    • http://files.tonysconstructioninc.com/uploads/1/3/1/1/131164275/koxekemapejufiluzo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/nafesowexiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/0568/9499/files/14012537504.pdf
    • https://cdn.shopify.com/s/files/1/0437/0196/0854/files/tuximubexevapewukeririni.pdf
    • https://cdn.shopify.com/s/files/1/0431/8203/1007/files/tinexulorilinoranuzexij.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/neruzibutogetifupajive.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/14724653058.pdf
    • https://cdn.shopify.com/s/files/1/0434/6609/6806/files/bitijimagiruzagetofu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1649/files/20119396447.pdf
    • https://cdn.shopify.com/s/files/1/0440/5523/2677/files/big_ideas_simply_explained_history.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kofuka.pdf
    • https://cdn.shopify.com/s/files/1/0429/0894/2499/files/28361692258.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/10275374169.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_off000072a4.bin
af9d8d33a52b2befe00d4806ee99ddb0003384af46e9e6a1d96cdc07c291d914		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72A4 5392 bytes
font_01_sfnt_off000084f9.bin
853b04caacda20d52aece1a33613ea44368b5629e6127025e6898bb4769a8264		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84F9 10280 bytes

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