Malicious PDF — malware analysis report

Static analysis result for SHA-256 09baf54f69ccda5b…

MALICIOUS

PDF

40.6 KB Created: 2020-08-30 02:51:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8021e3d9892c36f4627be0977a3394e3 SHA-1: 2192ca4294d73ef8e7366228221fee8df3538b36 SHA-256: 09baf54f69ccda5b3f5f63dc42bda4d8fa7b9acf57f024e7a6a21533fd72680d
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, which is indicative of a link farm. One critical heuristic identified a link to known malicious redirector infrastructure at `ttraff.com`. The ML classifier strongly supports maliciousness. While no scripts were extracted, the presence of numerous links and the identified malicious redirector suggest an attempt to lead users to harmful content, potentially for SEO manipulation or to host further stages of an attack.

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=superacion+personal+desarrollo+humano
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/9491/5738/files/69196542779.pdf
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/ranajuxilagalulebu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8339/9321/files/guida_turistica_bilbao.pdf
    • https://cdn.shopify.com/s/files/1/0432/5382/5694/files/advil_migraine_dosage_information.pdf
    • https://cdn.shopify.com/s/files/1/0433/9469/5318/files/dagevivunoxixi.pdf
    • https://static.usrfiles.com/ugd/b8c837_0b631993c6244b6d967a658805543a77.pdf
    • https://static.usrfiles.com/ugd/c162b3_482854e1ff4644d5aaa6e10b02a21743.pdf
    • https://static.usrfiles.com/ugd/b8c837_3333b93d602148d5a90ff195de6b3302.pdf
    • https://static.usrfiles.com/ugd/704566_e4eaff9a5eb046de93d97ea6e79949c0.pdf
    • https://static.usrfiles.com/ugd/b8c837_7e178cdb969847e5933a8d0d38cee5e7.pdf
    • https://cdn.shopify.com/s/files/1/0428/2882/4742/files/anti_dumping_agreement.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6647/files/bobcat_773_operators_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/2933/0077/files/photoshop_cs5_free_trial.pdf
    • https://cdn.shopify.com/s/files/1/0428/8924/8924/files/parasanefiwonulifufose.pdf
    • https://cdn.shopify.com/s/files/1/0430/8166/2628/files/52098707372.pdf
    • https://cdn.shopify.com/s/files/1/0435/9979/0243/files/68904299332.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_off000061ce.bin
a5f6e6940edea520cccfc575a63e0ffa9df2108e4160d4442e6a1af045d4a933		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61CE 5416 bytes
font_01_sfnt_off000073fd.bin
dd09cf72e0d68acbc3e52e965738bdd26ab5a299dee7bfd581162c702fc4a64b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73FD 9820 bytes

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