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) First seen: 2020-09-04
MD5: fc61df7f9d694874b46280a4a4b8fcea SHA-1: 8e8c080ddd860764476ce70d1d727fb4e3703a77 SHA-256: 1e232923558156d04c0608e172b8265df85495fb1361af1fe273bfbecb76753b
194 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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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 In PDF document text
    • http://files.niaimani.net/uploads/1/3/2/8/132816202/8796765.pdfIn PDF document text
    • http://files.cohncentric.com/uploads/1/3/0/7/130739616/bozivadeb-mabajotowa-pijisorefo-xopafir.pdfIn PDF document text
    • http://files.fhsproductions.com/uploads/1/3/0/7/130738719/ba94716.pdfIn PDF document text
    • http://files.vivagreb.com/uploads/1/3/1/6/131637034/kimab-sugala.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/wijozub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0663/9779/files/1953014267.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/gerawulizonolamav.pdfIn PDF document text
    • https://sixuxonudibi.files.wordpress.com/2020/06/retawumumulamokuvexumal.pdfIn PDF document text
    • https://genofukefi.files.wordpress.com/2020/06/15711924191.pdfIn PDF document text
    • https://kitafolek.files.wordpress.com/2020/07/81992715167.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5457/0399/files/juwarazonemuvofifitakaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0152/0029/files/xetuvokufabemiruxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6443/4583/files/giwope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8094/0709/files/88756493237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7490/2430/files/rukikeke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/85111974454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/runotuluvinus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2770/9597/files/nafojapuwiri.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76D0 5300 bytes
SHA-256: 77fda236808b2d5bb2662e961d19987441a274991058a7a109d356016d429f24
font_01_sfnt_off000088f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88F1 11308 bytes
SHA-256: 2d36efbf4843d754a10f22a210087fe7a27ffc20e63f6519d44b239673ae6e4b

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