Malicious PDF — malware analysis report

Static analysis result for SHA-256 141ba751850e0eeb…

MALICIOUS

PDF

44.0 KB Created: 2020-08-17 06:17:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcbfe9a9f57dffca1bfda40c584e3c3a SHA-1: ff32e602f25ef5ce75b1d3003510c82b5197de8f SHA-256: 141ba751850e0eebc91b8b47f3f7257d24ecc5d0b196f5c9848e416ceb68e1fb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which, 'https://ttraff.ru/pify?keyword=find+ip+address+of+wifi+router+android', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into visiting malicious infrastructure. The presence of numerous other PDF links further supports a link-farming or redirection-based attack pattern.

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.ru/pify?keyword=find+ip+address+of+wifi+router+android
    • http://files.mrfriedliclass.com/uploads/1/3/0/7/130740165/6097031.pdf
    • http://files.delreycollective.com/uploads/1/3/1/8/131871912/lowuluxelozok.pdf
    • http://files.fongfilms.com/uploads/1/3/1/3/131380251/71366a8a2f80a.pdf
    • http://lebusula.historicwestheight.org/uploads/1/3/2/7/132710712/vonoziguve-mezevaju-xavepupigimeza.pdf
    • http://files.tireddog-gooddog.com/uploads/1/3/0/7/130775563/3209473.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7110/1338/files/valorumaxuxikigesupunu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4610/8312/files/kuttymovies_2019_viswasam.pdf
    • https://cdn.shopify.com/s/files/1/0432/6414/7609/files/dry_white_wine_crossword_puzzle_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/0185/5646/files/adobe_after_effects_expressions.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/43412554361.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/44328464823.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40369191557.pdf
    • https://cdn.shopify.com/s/files/1/0431/8468/5224/files/2134561132.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e90.bin
0406d289ef422a7a3f68a8a0b4ba6d588595e6d8f44a8379ec66e2bb2991d0d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E90 5048 bytes
font_01_sfnt_off00007fda.bin
fd4ecc13517b3004abae2a3cc866ea9cf04e0ee71f5793171bb622f6dfd55de7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDA 10316 bytes