Malicious PDF — malware analysis report

Static analysis result for SHA-256 042e74f71b6b16af…

MALICIOUS

PDF

43.6 KB Created: 2020-08-24 16:17:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abd627b21bf6a1f4cf1870e275a15ae9 SHA-1: 97e7d1ab2dd873d36065803eefd47ea46459a19a SHA-256: 042e74f71b6b16af689fe342aae1993d9f2e76a958142ec629ff257ea36ad90a
162 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the ttraff.com domain. The document body, though heavily obfuscated, contains the same redirect URL, suggesting a deliberate attempt to lure users to a malicious site. The presence of numerous other PDF links further indicates a link farm or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=scert+punjab+ett+date+sheet+2019
    • http://files.yarnbomber.com/uploads/1/3/1/8/131871864/a7743ac69d6ae.pdf
    • http://files.shopsjh.com/uploads/1/3/1/1/131164129/c0f926e00c.pdf
    • http://xedez.francofestcalgary.com/uploads/1/3/0/7/130775734/5946576.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6409/8970/files/68935724984.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8980/files/52027966071.pdf
    • https://cdn.shopify.com/s/files/1/0432/7650/1147/files/5426746450.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/xaxuliviza.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/rumiforija.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/flip_text_upside_down.pdf
    • https://cdn.shopify.com/s/files/1/0436/7430/4662/files/mecanica_automobilistica.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/21726839669.pdf
    • https://cdn.shopify.com/s/files/1/0439/4080/6811/files/91829533558.pdf
    • https://cdn.shopify.com/s/files/1/0428/9848/9503/files/jeff_moss_dsr_twitter.pdf
    • https://cdn.shopify.com/s/files/1/0430/3178/9721/files/campanas_en_la_noche_letra.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_off00006aec.bin
cb5323de87ec3704ad76d70b0a8445908b9da2e617ff19c09cd660b20695152f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AEC 5928 bytes
font_01_sfnt_off00007f07.bin
e101cb963b02d414a20e8a305ec1540631d7aac80dd07f180432e1ed46656daf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F07 10076 bytes

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