Malicious PDF — malware analysis report

Static analysis result for SHA-256 5199102fcfffc745…

MALICIOUS

PDF

41.3 KB Created: 2020-08-04 10:57:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 284fda4b6acef50c96fbb1ace52501c5 SHA-1: 5d57f1659ec553ee198c9ab2fa1871c4c2db03f0 SHA-256: 5199102fcfffc7457e5295228a9563e1f184d6e77e9853cf72e83d33c7e47f47
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and mentions 'behaviourism and mentalism pdf', suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for obfuscation or to appear legitimate. The ML classifier strongly indicates 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=behaviourism+and+mentalism+pdf
    • http://files.laneryohirabayashi.com/uploads/1/3/1/3/131380569/e9537.pdf
    • http://files.refugecl.org/uploads/1/3/1/4/131438211/kuxelarupaxanirigi.pdf
    • http://files.authorkimfox.com/uploads/1/3/1/3/131379612/kemunafejebos_furugamoros_vagububike_wivosoruda.pdf
    • http://files.rrqlaw.com/uploads/1/3/0/7/130776726/xeropefas-votoxela-subuzefa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jojanasesejunuveko.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/67016268430.pdf
    • https://cdn.shopify.com/s/files/1/0437/9734/8514/files/70183215696.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0417/files/gajadedigu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5396/4702/files/96884958614.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3929/files/55047451083.pdf
    • https://cdn.shopify.com/s/files/1/0430/8484/1124/files/jiveronomaxepejejedeji.pdf
    • https://cdn.shopify.com/s/files/1/0433/3345/1944/files/vodanipuzugatizonudopox.pdf
    • https://cdn.shopify.com/s/files/1/0433/5173/6471/files/76450725856.pdf
    • https://cdn.shopify.com/s/files/1/0432/0064/3236/files/zukezowisovol.pdf
    • https://cdn.shopify.com/s/files/1/0433/9525/2374/files/plague_inc_bio_weapon_normal.pdf
    • https://cdn.shopify.com/s/files/1/0428/3426/4220/files/antibiotics_used_in_dental_infections.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_off0000666c.bin
949685c264cf5602dd98fe886ad90904e10133d640ca05f21d3b9fe8d949ca2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x666C 5392 bytes
font_01_sfnt_off0000789d.bin
bcad1c45aa66d0bc77ba81bb6e4d0dea9c25ec5c7ba86ccf7b5b0da2eb9e4112
pdf-font-stream PDF embedded font (sfnt) at offset 0x789D 9360 bytes