Malicious PDF — malware analysis report

Static analysis result for SHA-256 c89b8c9ce5050f02…

MALICIOUS

PDF

36.9 KB Created: 2020-08-09 05:33:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 358a8dab2bcaaff36721ad51dfabafcd SHA-1: 306f93aca16757158b8225afc37755fe1d8d5707 SHA-256: c89b8c9ce5050f029f9e76fde8791031d35db2666cb2001244bef3ec14c3a707
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at `ttraff.com`. The document body, though heavily corrupted, contains text suggesting it is a manual for 'Wondershare Filmora', a common lure for phishing or malware delivery. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to improve SEO for malicious content. No scripts were extracted from this sample.

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/pify?keyword=wondershare+filmora+manual+espa%25C3%25B1ol+pdf
    • http://xopedo.schulzeteach.com/uploads/1/3/1/1/131164250/793758.pdf
    • http://files.fauxmesticgoddess.com/uploads/1/3/1/8/131856381/gevaxil.pdf
    • http://files.jaztalks.com/uploads/1/3/1/0/131070940/5568622.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7072/files/83819896759.pdf
    • https://cdn.shopify.com/s/files/1/0431/8131/0114/files/69557944683.pdf
    • https://cdn.shopify.com/s/files/1/0429/1998/5319/files/rekuvaki.pdf
    • https://cdn.shopify.com/s/files/1/0437/2994/4730/files/historias_cortas_en_ingles.pdf
    • https://cdn.shopify.com/s/files/1/0431/3487/7847/files/laligitekuta.pdf
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/carte_du_monde__imprimer_avec_nom_des_pays.pdf
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/97531160038.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/32949240832.pdf
    • https://cdn.shopify.com/s/files/1/0431/7144/6939/files/bolitiwagudufimujawere.pdf
    • https://cdn.shopify.com/s/files/1/0434/6842/3334/files/bixelibidaxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/35781247000.pdf
    • https://cdn.shopify.com/s/files/1/0433/8129/3221/files/5738018989.pdf
    • https://cdn.shopify.com/s/files/1/0435/2393/2311/files/6453437688.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_off0000500a.bin
75ba3fb1746b1b6f207114e2e8feb2f0beeb6acfc31fc2f8dec825b239b91df1
pdf-font-stream PDF embedded font (sfnt) at offset 0x500A 5508 bytes
font_01_sfnt_off00006263.bin
7b9ce0b9a21d6a24931883b6438704f1072ee7b9a73694eb759e3bf4c7b7553e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6263 10152 bytes