Malicious PDF — malware analysis report

Static analysis result for SHA-256 2605095aedcf9d22…

MALICIOUS

PDF

43.4 KB Created: 2020-08-25 07:08:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 314da70e7dd1b87089aa0c49b279fea9 SHA-1: b91c3bb16d3d894b93ef263dd48770f67d0949a7 SHA-256: 2605095aedcf9d222d5514b5b3f60127e7e4f83a10c607081d76d56f8180bbb1
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 of which point to Shopify domains hosting other PDFs, creating a link farm. One critical link directs to a known malicious redirector at ttraff.com. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack pattern is the distribution of malicious links.

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=via+dolorosa+sheet+music+violin
    • http://vepubiwa.rdpresets.com/uploads/1/3/1/4/131453598/rotumumusonon-kofoxugu-tabibemebipozew-xeruro.pdf
    • http://rovitebim.malvernhillsridingclub.com/uploads/1/3/1/8/131857090/dovidul-xedatimetebekiv-mebisuwufuzuvud.pdf
    • http://files.foxstoneshelties.net/uploads/1/3/0/7/130775940/8692710.pdf
    • http://winijun.wildflourgrocer.com/uploads/1/3/2/7/132740541/lomufiva_kareluwud.pdf
    • http://files.surgicallycleanhands.com/uploads/1/3/0/7/130739490/0680c3110abf83.pdf
    • https://cdn.shopify.com/s/files/1/0431/3740/0999/files/bogojopukawonepiginugo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/95313117424.pdf
    • https://cdn.shopify.com/s/files/1/0462/3587/7525/files/rakunirapixokixofa.pdf
    • https://cdn.shopify.com/s/files/1/0434/6026/4096/files/capacitor_physics.pdf
    • https://cdn.shopify.com/s/files/1/0429/0890/9734/files/kazunapumoxasas.pdf
    • https://cdn.shopify.com/s/files/1/0428/8921/6163/files/40460541404.pdf
    • https://cdn.shopify.com/s/files/1/0436/7728/6565/files/bravely_archive_apk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0949/8536/files/kezaduzone.pdf
    • https://cdn.shopify.com/s/files/1/0438/6911/0432/files/dasavatharam_movie_audio_naa_songs.pdf
    • https://cdn.shopify.com/s/files/1/0445/7195/1268/files/genki_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0434/5787/2039/files/camera_video_recording_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/1161/0536/files/canara_bank_car_loan_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wunize.pdf
    • https://cdn.shopify.com/s/files/1/0434/5089/2440/files/kabodaxekone.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/
    • https://cdn.shopify.com/s/files/1/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006068.bin
c16bf990e17f655824ef68806497925a91182130cd13780959e3ac7d8b437c44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6068 5204 bytes
font_01_sfnt_off000071fa.bin
1953e70f35324317fbd63f6cbaa1978a75555b2e7a8b0bf9d61f8238edb7962d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71FA 14264 bytes

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