Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc7ef3d03edfcc8f…

MALICIOUS

PDF

16.7 KB Created: 2020-07-17 03:49:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecd3db591cfc4cd1543c34668a299016 SHA-1: d655302df57f2df62a78d1a122ce93112b54befa SHA-256: bc7ef3d03edfcc8fa2cdca6cc8e111ba20c22e50d6b4f1e063908bcd6dfde529
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF is identified as an image-only lure, a common tactic for phishing or malware delivery. It contains a critical malicious redirector link to 'ttraff.ru' and a large number of external PDF links, many hosted on Shopify, suggesting a link farm for SEO manipulation or traffic redirection. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack vector appears to be the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 2 image(s), only 0 text block(s), carries a click-outward action, and is only 16 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.ru/wb?keyword=advances%20in%20social%20network%20mining%20and%20analysis%20pdf
    • http://files.fablabav.com/uploads/1/3/2/7/132712116/zipodo.pdf
    • http://files.omanroadshow.com/uploads/1/3/0/7/130776841/kasulojemuv.pdf
    • http://files.shenteachers.com/uploads/1/3/1/4/131483685/xixubuli_foradosidi.pdf
    • http://files.namiromega.org/uploads/1/3/1/3/131378899/darupenedo.pdf
    • http://files.kevmol.com/uploads/1/3/0/8/130873758/efe6b036ac9.pdf
    • https://cdn.shopify.com/s/files/1/0431/3923/5997/files/ferupuvevarabesibulus.pdf
    • https://cdn.shopify.com/s/files/1/0432/7342/0965/files/12599916351.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8216/files/25384251023.pdf
    • https://lulepolagud.files.wordpress.com/2020/07/gedeborinelogepame.pdf
    • https://gezuduropen419134146.files.wordpress.com/2020/07/pipiwuvarozanemoxuniz.pdf
    • https://besolofebuna.files.wordpress.com/2020/07/dotuwofasipukas.pdf
    • https://fakoxej.files.wordpress.com/2020/06/38523660918.pdf
    • https://fijimisu.files.wordpress.com/2020/06/tifiwavededokakukosaru.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7311/files/58495455285.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/pulanojipikobiw.pdf

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