Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b7f4230d35410f…

MALICIOUS

PDF

46.5 KB Created: 2020-08-29 19:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 322b62fd2d062f7dd26b5aad148c7f88 SHA-1: 8931ddf0ba0e0272e7d9918a28cbaa4cb12c7cd4 SHA-256: 69b7f4230d35410fffed605aabd8de970d67c7c429a52bef3da47f985bab2c80
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF SEO link farm, embedding numerous external PDF links. The primary malicious IOC is the link to 'ttraff.com', which is a known redirector.

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/wix?keyword=the+passion+translation+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6209/9097/files/projeo_ortogonal_exercicios_resolv.pdf
    • https://cdn.shopify.com/s/files/1/0436/3508/1374/files/dapozevapugozadoxawujepun.pdf
    • https://cdn.shopify.com/s/files/1/0437/8198/0317/files/highlight_differences_in_two_excel_spreadsheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/0115/9575/files/33143896317.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/automotive_technology_4th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9508/1625/files/69689799450.pdf
    • https://cdn.shopify.com/s/files/1/0436/5582/3525/files/6447213982.pdf
    • https://cdn.shopify.com/s/files/1/0429/9282/8579/files/nusujaxabosavorudukakoje.pdf
    • https://static.usrfiles.com/ugd/760101_1d226936989f4410b334f4f8be401c26.pdf
    • https://static.usrfiles.com/ugd/3f80ec_925553640e104357ac60473d543f2314.pdf
    • https://static.usrfiles.com/ugd/a4e402_c61d854d2794493a98c1926f77223bd2.pdf
    • https://static.usrfiles.com/ugd/e32576_284620503dde49c7a5287a84aa19d437.pdf
    • https://static.usrfiles.com/ugd/b8c837_de27bb6799ad459982c9868d9d06c784.pdf
    • https://static.usrfiles.com/ugd/b8c837_077e278c17bf4e66a40d68766f480c64.pdf
    • https://static.usrfiles.com/ugd/b8c837_e73519f9ed3340439bb3c4590368a882.pdf
    • https://static.usrfiles.com/ugd/b8c837_69864e2194be4bcab8c9cf96bf64d9ec.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_off000076e4.bin
60cfb6268e473ed899b72315a5e3c835fabdc18926a51296972626f8cbd3a7d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x76E4 5080 bytes
font_01_sfnt_off0000881c.bin
a92aff5902281e09eb10da39012166d8a5061dd9c0615351e802358df0ba3550
pdf-font-stream PDF embedded font (sfnt) at offset 0x881C 11264 bytes