Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e232923558156d0…

MALICIOUS

PDF

47.1 KB Created: 2020-07-21 21:01:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc61df7f9d694874b46280a4a4b8fcea SHA-1: 8e8c080ddd860764476ce70d1d727fb4e3703a77 SHA-256: 1e232923558156d04c0608e172b8265df85495fb1361af1fe273bfbecb76753b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). This suggests a link farm or SEO poisoning attack designed to drive traffic to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=gustavo%20cerati%20biografia%20pdf
    • http://files.niaimani.net/uploads/1/3/2/8/132816202/8796765.pdf
    • http://files.cohncentric.com/uploads/1/3/0/7/130739616/bozivadeb-mabajotowa-pijisorefo-xopafir.pdf
    • http://files.fhsproductions.com/uploads/1/3/0/7/130738719/ba94716.pdf
    • http://files.vivagreb.com/uploads/1/3/1/6/131637034/kimab-sugala.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/wijozub.pdf
    • https://cdn.shopify.com/s/files/1/0432/0663/9779/files/1953014267.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/gerawulizonolamav.pdf
    • https://sixuxonudibi.files.wordpress.com/2020/06/retawumumulamokuvexumal.pdf
    • https://genofukefi.files.wordpress.com/2020/06/15711924191.pdf
    • https://kitafolek.files.wordpress.com/2020/07/81992715167.pdf
    • https://cdn.shopify.com/s/files/1/0435/5457/0399/files/juwarazonemuvofifitakaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/0152/0029/files/xetuvokufabemiruxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6443/4583/files/giwope.pdf
    • https://cdn.shopify.com/s/files/1/0434/8094/0709/files/88756493237.pdf
    • https://cdn.shopify.com/s/files/1/0437/7490/2430/files/rukikeke.pdf
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/85111974454.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/runotuluvinus.pdf
    • https://cdn.shopify.com/s/files/1/0432/2770/9597/files/nafojapuwiri.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076d0.bin
77fda236808b2d5bb2662e961d19987441a274991058a7a109d356016d429f24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76D0 5300 bytes
font_01_sfnt_off000088f1.bin
2d36efbf4843d754a10f22a210087fe7a27ffc20e63f6519d44b239673ae6e4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88F1 11308 bytes

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