Malicious PDF — malware analysis report

Static analysis result for SHA-256 d59bfdc3a46db901…

MALICIOUS

PDF

41.8 KB Created: 2020-08-07 14:32:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7170f1485a6532e995a3e1bcdf02ffc4 SHA-1: 3e606a62b9c65f95dbcb59282713a917b9f1bda1 SHA-256: d59bfdc3a46db901e9d7834d5d2a0b5b286bb8a30cdae6c3a21c0446a9d1c778
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a prominent call-to-action disguised as a free PDF to Word converter. This lure directs users to a URL hosted on 'ttraff.ru', which is flagged as a malicious redirector. The document also contains a large number of embedded links, many pointing to Shopify domains, likely as part of an SEO link farm to improve search engine ranking for malicious content. The primary malicious link is https://ttraff.ru/pify?keyword=change+pdf+file+to+word+document+free.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=change+pdf+file+to+word+document+free
    • http://files.livingmetroeast.com/uploads/1/3/2/6/132681201/lavuvimezamasaja.pdf
    • http://files.monticellostory.com/uploads/1/3/1/3/131380158/votibewabut.pdf
    • http://files.toricoryphotography.com/uploads/1/3/0/7/130740563/pefavojobiwur.pdf
    • https://cdn.shopify.com/s/files/1/0435/3998/8648/files/67876398570.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/brunner_and_suddarth_s_textbook_of_medical_surgical_nursing_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/3735/1323/files/bhagavad_gita_full_story_in_kannada.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2667/files/35732487976.pdf
    • https://cdn.shopify.com/s/files/1/0432/8911/6840/files/31232586354.pdf
    • https://cdn.shopify.com/s/files/1/0431/8052/3681/files/linipiromadurobanuwawekad.pdf
    • https://cdn.shopify.com/s/files/1/0432/0791/7729/files/21897889435.pdf
    • https://cdn.shopify.com/s/files/1/0433/7149/5574/files/geographical_information_systems_in_archaeology.pdf
    • https://cdn.shopify.com/s/files/1/0435/0928/5024/files/ziluxefafuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/7941/7504/files/58679254355.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/phonetics_and_phonology_test_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0440/8557/5832/files/amenorrhea_sekunder.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006419.bin
82ce830bc861197722330809684f7eef50dfde74fd5d1b6c199e385bc5ef4bf4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6419 5388 bytes
font_01_sfnt_off00007658.bin
fc9f0b54d9d91859fa014c700211607467e0527c3cccbe09489342b7d7898b7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7658 10580 bytes