Malicious PDF — malware analysis report

Static analysis result for SHA-256 80ff037b8c5f22fd…

MALICIOUS

PDF

51.1 KB Created: 2020-08-23 02:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e80c1d744a9303d5c27724e56a04375d SHA-1: a0321801bb1a13e285fcfaa3f54b006b537a82bc SHA-256: 80ff037b8c5f22fd78ad443154f074ca581865b835dcc778b2aa40e388cd5ecb
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 text related to 'Android games apk obb highly compressed' and the malicious URL itself. This suggests the document is a lure to redirect users to potentially malicious content, likely for malware distribution or phishing. The ML classifier also strongly flagged this PDF as malicious.

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=android+games+apk+obb+highly+compressed
    • http://fujani.janedenton.net/uploads/1/3/0/7/130739693/7878560.pdf
    • http://files.threeatlantacats.com/uploads/1/3/1/4/131438079/viwebipizinowi_dironaxe_janojawumuwasi.pdf
    • http://files.jgfirpo.com/uploads/1/3/1/4/131455275/618364b85a94.pdf
    • http://files.venturecreationcafe.com/uploads/1/3/1/4/131408664/1ae21bb616ad.pdf
    • https://cdn.shopify.com/s/files/1/0431/7403/5607/files/tubozijurefarivevon.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7715/files/reasoning_and_computer_aptitude_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/potumigewovivesative.pdf
    • https://cdn.shopify.com/s/files/1/0428/4832/1692/files/36690591627.pdf
    • https://cdn.shopify.com/s/files/1/0432/1751/8751/files/kalip.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9236/files/tezok.pdf
    • https://cdn.shopify.com/s/files/1/0437/1054/6074/files/11987821135.pdf
    • https://cdn.shopify.com/s/files/1/0432/8154/7424/files/kexilewuzola.pdf
    • https://cdn.shopify.com/s/files/1/0458/2365/6099/files/7045415123.pdf
    • https://cdn.shopify.com/s/files/1/0434/4823/8242/files/married_life_in_islam.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b32.bin
3cfa099f48767550bc8f84c23f952290b7b29cfdea711ad83f82673d9360bccf
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B32 5492 bytes
font_01_sfnt_off00008da0.bin
c3476c2ca063bab77b045624648e393f29a0ff435b0d134f62208badb5429c4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA0 10412 bytes
font_02_sfnt_off0000b140.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xB140 4324 bytes