Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b2b207fd2a7cb05…

MALICIOUS

PDF

34.0 KB Created: 2020-08-19 19:09:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 776be4acf0579e6aea5582ce9666d36f SHA-1: b3264b3c2619adcf3a8bde9fbcc3c17d3b61c1a9 SHA-256: 5b2b207fd2a7cb0583981bf01b7d2bd8d5e83fa5bfb0cf70a1df1ed1bc88a7d5
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=music+birds+chirping, which is likely intended to trick the user into clicking it. The PDF also contains a large number of external links, suggesting a link farm or SEO manipulation tactic.

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=music+birds+chirping
    • http://files.dangerous.studio/uploads/1/3/0/8/130813516/daginegunesizeloje.pdf
    • http://files.thehuicholcenter.org/uploads/1/3/1/3/131380292/mikososofugo.pdf
    • http://files.velohangar.com/uploads/1/3/1/8/131871633/dikelajukatan_migije_rokoxonob_jawotadenatise.pdf
    • http://jasogivuz.worthingexcelsior.co.uk/uploads/1/3/0/7/130776326/gokaxubutitisepusuli.pdf
    • http://files.runtuffborzoi.com/uploads/1/3/2/6/132695734/wirosobanawoxisi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0133/1360/files/digital_branding_strategy.pdf
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/belmont_report_educational_video.pdf
    • https://cdn.shopify.com/s/files/1/0439/8232/3870/files/16196206421.pdf
    • https://cdn.shopify.com/s/files/1/0433/9128/7450/files/robinair_34288_problems.pdf
    • https://cdn.shopify.com/s/files/1/0433/0517/3147/files/75713816294.pdf
    • https://cdn.shopify.com/s/files/1/0431/8923/9969/files/bajaj_boxer_150_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mubexuv.pdf
    • https://cdn.shopify.com/s/files/1/0436/5356/2526/files/qualified_audit_report_sample.pdf
    • https://cdn.shopify.com/s/files/1/0432/9000/1572/files/piwuvugaxiterizexuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/5323/6902/files/56549414946.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/89090047913.pdf
    • https://cdn.shopify.com/s/files/1/0434/4394/5628/files/lunajolanelu.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_off000048c3.bin
6ace583b1d7b3e9bf6fe2a22b7b3423994b2c536c7312bd84bbeb6d11d606c71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48C3 5240 bytes
font_01_sfnt_off00005a86.bin
8d1120261efa3785ed1ceba53b8464fa6feec11793e792ec2b5c227263ab6a33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A86 9588 bytes

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