Malicious PDF — malware analysis report

Static analysis result for SHA-256 510cfcd06870305e…

MALICIOUS

PDF

42.3 KB Created: 2020-08-24 07:27:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa816e136436b77541ce7c5503f4db1d SHA-1: 6c6a8a35b6ee5966ab8c92c9b17fbf20aa11e340 SHA-256: 510cfcd06870305e76196f85f1c12d5d96ca534e30f9b8b448105975b1ed0b7c
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, which is indicative of a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector at 'ttraff.com', suggesting the document's primary purpose is to redirect users to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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=ampex+350+manual
    • http://files.dynacomltd.com/uploads/1/3/2/7/132710782/5a1451c1.pdf
    • http://files.enchantedcirclesseries.com/uploads/1/3/1/0/131070476/0cf8865a264d.pdf
    • http://www.ampexdata.com
    • https://cdn.shopify.com/s/files/1/0432/4517/4939/files/fuxipewexepug.pdf
    • https://cdn.shopify.com/s/files/1/0429/8617/6675/files/nonuwobifazurobetu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5052/3031/files/sapaguvukukunagomavoniw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0546/8068/files/tanebalabatik.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bepojarovizezeba.pdf
    • https://cdn.shopify.com/s/files/1/0437/6562/9077/files/android_10_gestures_pixel_3.pdf
    • https://cdn.shopify.com/s/files/1/0435/5470/1461/files/3397468199.pdf
    • https://cdn.shopify.com/s/files/1/0428/3462/4679/files/befogetolikigu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6857/files/dujugijilojeke.pdf
    • https://cdn.shopify.com/s/files/1/0432/1076/8546/files/cisco_routing_and_switching.pdf
    • https://cdn.shopify.com/s/files/1/0437/6638/2746/files/lemudaxafalutalabik.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_off00005e60.bin
5fbe647daf6a7d1a3f6e7f3ae6dde6be2d41e125b18bc92adea26834b44fd5ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E60 5180 bytes
font_01_sfnt_off00006ff4.bin
27912288066e81df486fdbb7309f3cd9c4441c5aa33bff764714646b57a62349
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF4 14416 bytes