Malicious PDF — malware analysis report

Static analysis result for SHA-256 09e01c7557fbbc25…

MALICIOUS

PDF

41.8 KB Created: 2020-08-11 12:40:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af349ca1c7b118f70f045367a5debccd SHA-1: 7286c5fff1600db76cc79edbe8fddc696752b5ca SHA-256: 09e01c7557fbbc250f97ee95c6301c6007ea315cb356d13ed6c75679e90c1d3e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The document also includes a large number of links to other PDFs, suggesting a link farm or SEO poisoning attempt to attract victims. The ML classifier 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=221b+baker+street+game+additional+cases+pdf
    • http://files.glennacole.com/uploads/1/3/1/3/131398487/liguded-bazikixa-bakuzatokosubam-dasagajabo.pdf
    • http://files.merrywandererteaching.com/uploads/1/3/1/3/131384636/mabenid_worife.pdf
    • http://muwapanon.companionsnotlivestock.org/uploads/1/3/0/7/130776262/dojibu-tufitoret.pdf
    • http://files.hayman.co.nz/uploads/1/3/0/8/130873826/bolavuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/6196/7013/files/bhagavad_gita_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/5521/7814/files/42087230254.pdf
    • https://cdn.shopify.com/s/files/1/0433/8846/9398/files/nusuwujokibegigobirata.pdf
    • https://cdn.shopify.com/s/files/1/0428/6867/0620/files/woxunixogomaze.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1365/files/2000_ford_expedition_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/6042/8962/files/88039495066.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2341/files/ninidonoketesane.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/97751458566.pdf
    • https://cdn.shopify.com/s/files/1/0430/6544/2457/files/niwobazasoburup.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gevuruliwineda.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4011/files/wogadanezadopipedu.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_off00006403.bin
7343ee55448f4d53177a4111267991fb5d871654a0d2ebe609bd383a7e83829a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6403 5768 bytes
font_01_sfnt_off0000778c.bin
e56d99e837e0d1c05413c237a775c5727fa083f9f91f44041643343375080ec8
pdf-font-stream PDF embedded font (sfnt) at offset 0x778C 10016 bytes