Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea18c3c2b14baaf…

MALICIOUS

PDF

58.1 KB Created: 2020-08-01 12:22:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e55f4badbdb482ac4d581404c66ca604 SHA-1: 3ca734f79df3fcfcc4244097d069b975d269c30f SHA-256: bea18c3c2b14baaf819f4f5fd813085ac68bdc7c1a1b716b6085b32b3caf3298
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This link is presented to the user with the lure of 'fire red cheats'. The document also contains a PDF link farm, with many links pointing to Shopify domains, one of which is identified as a potential redirector. 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=fire+red+cheats
    • http://files.oceanspartansfootball.com/uploads/1/3/0/8/130873728/jasuwefo.pdf
    • http://files.bmwclubulstersection.com/uploads/1/3/2/3/132303181/kudas.pdf
    • http://files.amypoe.com/uploads/1/3/0/8/130874015/5069387.pdf
    • http://files.kajakeriet.com/uploads/1/3/1/6/131637163/sifoguvobe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/lijozazavefopovasomuse.pdf
    • https://cdn.shopify.com/s/files/1/0435/4319/9898/files/bonud.pdf
    • https://cdn.shopify.com/s/files/1/0433/0523/8692/files/mixuvuzojujosafawu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sovir.pdf
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/brother_mfc-_240c_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2044/files/ad_d_players_handbook_1st_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6261/files/20384773344.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/puwazawusod.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/40141689541.pdf
    • https://cdn.shopify.com/s/files/1/0439/1878/6728/files/sirusimapididokimejag.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57790570823.pdf
    • https://cdn.shopify.com/s/files/1/0439/0407/3883/files/zixosikawof.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/28133169806.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_off000094b7.bin
61dfde12cdc60ea0d90b9d2adc5e5503d39574f62b355482a18bf68bffe6336d
pdf-font-stream PDF embedded font (sfnt) at offset 0x94B7 4952 bytes
font_01_sfnt_off0000a586.bin
d032af87e6c4d1575dab3a9af5c5a7f7eded41f5b8570bd9ee92a7e2279dd124
pdf-font-stream PDF embedded font (sfnt) at offset 0xA586 17828 bytes