Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d864dea90d0201…

MALICIOUS

PDF

42.8 KB Created: 2020-08-05 11:19:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbb34b0eee3d7f88993d772db04b77cb SHA-1: 464c0df0f0f54d1a43a9fda0e60100a6dacc871d SHA-256: b0d864dea90d020104b4e43f23d455ace21a1f7951c1f60895dec158c3bbb9ff
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to the known malicious redirector ttraff.com. The majority of the links lead to external PDF files hosted on Shopify, suggesting a link farm or SEO manipulation tactic. 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=abortus+habitualis+adalah+pdf
    • http://files.efficientsolardesign.com/uploads/1/3/1/4/131452942/zewok.pdf
    • http://files.jamesbev.com/uploads/1/3/1/6/131637308/zezimebi.pdf
    • http://files.imagingdeepspace.com/uploads/1/3/1/4/131482826/3036797.pdf
    • http://files.potluckcornwall.co.uk/uploads/1/3/0/7/130738614/redobovupane_jinefojulo_dikufiwiwasimop.pdf
    • http://files.mymanelegacy.com/uploads/1/3/1/4/131413718/numoji.pdf
    • https://cdn.shopify.com/s/files/1/0433/4642/8072/files/sf_blendmode_sfml.pdf
    • https://cdn.shopify.com/s/files/1/0432/6375/4408/files/wasaferojuvogaforesok.pdf
    • https://cdn.shopify.com/s/files/1/0432/6332/8424/files/ct_dmv_q1_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/67796494597.pdf
    • https://cdn.shopify.com/s/files/1/0440/8950/7990/files/94684299595.pdf
    • https://cdn.shopify.com/s/files/1/0434/3971/8552/files/buxatepudekegajigoguz.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0030/files/rotiliturorejurilolufativ.pdf
    • https://cdn.shopify.com/s/files/1/0434/4017/7314/files/redajekesogapumobomasoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/0609/8597/files/barista_training_manual_starbucks.pdf
    • https://cdn.shopify.com/s/files/1/0432/7574/7483/files/robagu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/10654652072.pdf
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/zajuguraguxixadi.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_off00006acf.bin
152d135d9d371000de914535582caa954dda252dfdf38be1f5d7a1219000e2ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACF 5256 bytes
font_01_sfnt_off00007c9b.bin
73f87d25e0732148fc1b05cc519104353d51439921711503fe8efd90b1cd2812
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C9B 9876 bytes