Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b2d4d94bf1d118…

MALICIOUS

PDF

43.2 KB Created: 2020-08-12 19:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d5919b7ec5f4e892db1c70d6cd22dca SHA-1: f95b94da9fbbac518c1d5c85d7bea9a99a11763c SHA-256: 72b2d4d94bf1d1188e8f0ae3d8df11e4b92258bed538e9342dd85e04299f38ba
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to external resources, including a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a 'Mariamman story in Tamil PDF'. The presence of a malicious redirector link and a large number of external links suggests an attempt to drive traffic to potentially harmful sites, likely for phishing or malware distribution.

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.cc/wb?keyword=mariamman%20story%20in%20tamil%20pdf
    • http://files.stephaniemclaughlinart.com/uploads/1/3/0/7/130775380/788765.pdf
    • http://files.dankoairguns.com/uploads/1/3/1/0/131070195/zelev.pdf
    • http://pinabag.dasmith.ca/uploads/1/3/1/8/131856570/nonok_dufidowajenap_batavemeti.pdf
    • http://wepug.levelupchurchmemphis.com/uploads/1/3/2/6/132683097/71943b88.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6676/1120/files/rurovutarovowiwidudo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pedarivorenali.pdf
    • https://cdn.shopify.com/s/files/1/0428/9635/9580/files/73997826981.pdf
    • https://cdn.shopify.com/s/files/1/0434/3991/5175/files/negokeviduwugedo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3159/3113/files/jikemomupa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5820/8672/files/desosiz.pdf
    • https://cdn.shopify.com/s/files/1/0448/1007/6321/files/sales_process_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bofudajix.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lozafawofife.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5400/files/tudapolikifesenaxubipe.pdf
    • https://cdn.shopify.com/s/files/1/0428/5497/3606/files/16649219874.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4333/files/zemixizigiruj.pdf
    • https://cdn.shopify.com/s/files/1/0437/7886/7358/files/xetigagupuwusaji.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_off00006d60.bin
1c806e45bde7ae6eda1422e15ff25797282563b72b551e8008e2cab099221395		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D60 5292 bytes
font_01_sfnt_off00007f52.bin
6a27314d357d0fdba7423b11559e240f99a5d720a0f7f2bab3004d645b33f355		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F52 9492 bytes

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