Malicious PDF — malware analysis report

Static analysis result for SHA-256 08bc47b6c01e76a8…

MALICIOUS

PDF

43.4 KB Created: 2020-08-05 03:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec6e19d3b2aa367fc2d664fc847a9d63 SHA-1: a5a2802c1d2e28ddfc39d3d1ff0686e9bc429ac7 SHA-256: 08bc47b6c01e76a8a74b3a6ebaccb36a7667e9d0d969c6271c55a7518b0460d3
154 Risk Score

Malware Insights

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

The PDF contains embedded links that are part of a link farm, with one critical heuristic identifying a redirector to malicious infrastructure. The document body, though partially corrupted, contains text that appears to be a lure for a Goodman furnace manual. The presence of multiple embedded URLs, including one identified as a malicious redirector, suggests an attempt to lead the user to a compromised site.

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/wb?keyword=goodman%20furnace%20gmss96%20installation%20manual
    • http://napozitil.ericaevansartist.com/uploads/1/3/1/6/131607062/4ad5a280a1f.pdf
    • http://files.cotcbos.org/uploads/1/3/0/8/130874495/1577224.pdf
    • http://muduve.umstu.com/uploads/1/3/1/3/131384169/3f9df2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6710/3645/files/seadoo_underwater_scooters.pdf
    • https://cdn.shopify.com/s/files/1/0429/8060/6111/files/busafenol.pdf
    • https://cdn.shopify.com/s/files/1/0437/7555/7793/files/pubaso.pdf
    • https://cdn.shopify.com/s/files/1/0436/0844/0990/files/17132854783.pdf
    • https://cdn.shopify.com/s/files/1/0432/4448/6811/files/wotas.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4515/files/65610217393.pdf
    • https://cdn.shopify.com/s/files/1/0434/6934/0822/files/18687383871.pdf
    • https://cdn.shopify.com/s/files/1/0428/7594/5113/files/kivijigorerukadakaves.pdf
    • https://cdn.shopify.com/s/files/1/0435/8009/6667/files/pejupotube.pdf
    • https://cdn.shopify.com/s/files/1/0429/9010/8833/files/66641666701.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/gijugalutoj.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_off00006962.bin
72d6e8cbea74452cbf5137a6930270d8631d54fc78dbd31e7cbbb63a8c2f2ddd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6962 5680 bytes
font_01_sfnt_off00007c96.bin
225344b578acd18bd19536ec67ab5ad751da476d5ed73ad4cf5236df7bb0bd46
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C96 10608 bytes