Malicious PDF — malware analysis report

Static analysis result for SHA-256 04a61b8ec806bfe9…

MALICIOUS

PDF

40.3 KB Created: 2020-08-25 02:06:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddc9577fee6d88efd92871dbc2baf9c4 SHA-1: 2dd88e64ef504c9609771ddeb646a7afddc338b9 SHA-256: 04a61b8ec806bfe9c75daefd6957d2024fe95f05ed3dd6d1f8ff2c381bc68435
162 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=sheet+music+army+song', which is flagged as malicious. This suggests the document is part of a link farm or SEO manipulation scheme designed to redirect users to malicious content, likely as a phishing or malware distribution lure.

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=sheet+music+army+song
    • http://files.donnamulhollandstudio.com/uploads/1/3/0/7/130776388/dufanebegu.pdf
    • http://tutal.spiralofaccountability.com/uploads/1/3/1/6/131636725/444936e40.pdf
    • http://files.williammonaguenativeart.com/uploads/1/3/0/7/130739747/vunidegote.pdf
    • http://files.ame-geolab.com/uploads/1/3/1/6/131637402/gofibukazizo_texoji_beweku_dipopogi.pdf
    • http://files.veresan.com/uploads/1/3/0/7/130776054/dcfa9a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6332/8418/files/pisakomeru.pdf
    • https://cdn.shopify.com/s/files/1/0435/0381/2773/files/3055252399.pdf
    • https://cdn.shopify.com/s/files/1/0429/8702/8641/files/60564577582.pdf
    • https://cdn.shopify.com/s/files/1/0428/5100/8671/files/tamob.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5780/files/48849787894.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/85114950502.pdf
    • https://cdn.shopify.com/s/files/1/0427/7541/2902/files/biological_anthropology_michael_alan_park.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2334/files/roserava.pdf
    • https://cdn.shopify.com/s/files/1/0450/6681/3590/files/tuzikaxenatatedixisata.pdf
    • https://cdn.shopify.com/s/files/1/0436/9648/8613/files/wogimovetigufunukiba.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_off00005fc4.bin
55b128b52ffa0e3fe6fc594dd49a3bfc7f2da6434dbb6ab775b2abef8b5eadfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC4 5388 bytes
font_01_sfnt_off000071f1.bin
29dacbd982e13ce760d1e3bd654b3bc8a2962d9f60b39913e14d477a2b77800b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71F1 10220 bytes

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