Malicious PDF — malware analysis report

Static analysis result for SHA-256 68275dac809da272…

MALICIOUS

PDF

44.4 KB Created: 2020-08-10 09:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac9a576b98fa2c2518319ae19e80c493 SHA-1: 41e46b4bac4c7a1100a99d4514b41cdffc17bffc SHA-256: 68275dac809da2721e88722a1503fe446b938ea51aff10f70a5bbcd3fe2e3eab
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) known for malicious activity. The document body, though heavily obfuscated, also contains the same redirector URL. This suggests a phishing or scam attempt where users are directed to malicious infrastructure.

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=incentive+spirometry+instructions+pdf
    • http://files.melaniewhipman.com/uploads/1/3/0/7/130775429/343bd5ae.pdf
    • http://files.goldenmountainguides.com/uploads/1/3/1/4/131483371/burejixugisevo-direto-bududotuxuwe.pdf
    • http://gufak.newhopewes.com/uploads/1/3/0/8/130874359/begesafodopefafef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5973/0839/files/35862883215.pdf
    • https://cdn.shopify.com/s/files/1/0430/6278/8245/files/tufomapokepif.pdf
    • https://cdn.shopify.com/s/files/1/0436/3796/4960/files/yahtzee_score_sheet_printable.pdf
    • https://cdn.shopify.com/s/files/1/0430/9663/7597/files/mercado_cervantino_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/3382/9271/files/siwufen.pdf
    • https://cdn.shopify.com/s/files/1/0428/8852/8035/files/monitoring_and_evaluation_framework.pdf
    • https://cdn.shopify.com/s/files/1/0428/8105/6935/files/nuripojezoxaxazedofoja.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/38803009841.pdf
    • https://cdn.shopify.com/s/files/1/0430/3867/1010/files/95709263927.pdf
    • https://cdn.shopify.com/s/files/1/0429/6491/0243/files/49805359082.pdf
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/zuvamuzewikozijiseruji.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vazakiliduvapi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/laruruwoxopez.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_off00006e8a.bin
1320403d401f241be46595187152957ef54ec273be2e5bacd79d09f75ee113ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8A 5156 bytes
font_01_sfnt_off00008018.bin
a641a264758fdb3ef95a32dee04b3aa05f2c5df5d7b3da89f8a12dc1d7beadc2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8018 10748 bytes