Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f612f8913f3317…

MALICIOUS

PDF

42.8 KB Created: 2020-08-07 23:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfa5eb6224bb61809fd8a77dc09e26eb SHA-1: 82913aecb5c7564d59643e2a155eaf798b98ffd5 SHA-256: a0f612f8913f33174087285a4509e47180a451bf811025eda3bc973d64ad345e
152 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The embedded URL 'https://ttraff.com/pify?keyword=causative+have+get+exercises+pdf' is a primary indicator of malicious intent, likely serving as a gateway to further malicious content. The presence of numerous external PDF links, many hosted on Shopify, suggests a tactic to distribute malicious content through seemingly legitimate platforms.

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=causative+have+get+exercises+pdf
    • http://files.theraceshack205.com/uploads/1/3/2/6/132696483/a1970.pdf
    • http://files.iancuttingphotography.co.uk/uploads/1/3/1/1/131164027/genaf_pozevuki.pdf
    • http://rarijol.brucereevesswiftamericasartist.com/uploads/1/3/1/3/131383657/jelizedilelez-tisowe-gebanimarukiri-pukime.pdf
    • http://files.joelcookart.com/uploads/1/3/0/8/130815093/6ee4cc3a88.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/bimewibarawalesamobiko.pdf
    • https://cdn.shopify.com/s/files/1/0432/3262/4797/files/81397636149.pdf
    • https://cdn.shopify.com/s/files/1/0429/6779/3820/files/21087394056.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/37741658126.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/68487069462.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nisexabidubukov.pdf
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/91281413238.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3866/files/fixumuwasejujosaxo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8988/7396/files/dungeons_and_dragons_draconomicon.pdf
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/80164913337.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/baptism_bible_study.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_off00006854.bin
e005891c5098c3f6df0947d012232064be2ee0e8c3a920f780c8bfd07456e3c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6854 5420 bytes
font_01_sfnt_off00007aca.bin
295c89a06fa827bea97b542268574b312f02c9a95f6d5bc539627ddfbd3504db
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACA 10412 bytes