Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf5507df5103ae8b…

MALICIOUS

PDF

54.6 KB Created: 2020-08-11 14:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 190a924f87c138e22b54b2b995cedce3 SHA-1: 9258281be348e2ee7d9dad9fdb40d2a478c4e368 SHA-256: cf5507df5103ae8b28e3c2597e77338fd7683e48c4a4c92f8e7865501de2fe09
128 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which likely serves as a gateway to further malicious content or phishing pages. The presence of a 'download button' lure reinforces the deceptive nature of the document.

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.com/pify?keyword=save+base64+pdf+to+file+c%2523
    • http://gumuro.leiawood.com/uploads/1/3/0/8/130814535/8d2262257.pdf
    • http://files.marciaoliveirahealing.com/uploads/1/3/1/3/131398231/a51947.pdf
    • http://finilile.coloryourlifewithflowers.org/uploads/1/3/1/4/131407592/torimogozoda_luxakev.pdf
    • http://files.nativetales.com/uploads/1/3/0/7/130775942/b90bae542e.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/toraladomokipina.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/kapijiwewe.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6780/files/juparisazafosopilowato.pdf
    • https://cdn.shopify.com/s/files/1/0429/8568/5153/files/43923886980.pdf
    • https://cdn.shopify.com/s/files/1/0434/2156/5078/files/organic_chemistry_fourth_edition_janice_smith.pdf
    • https://cdn.shopify.com/s/files/1/0433/6821/8780/files/20468790879.pdf
    • https://cdn.shopify.com/s/files/1/0427/3173/3159/files/celestine_prophecy_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1825/files/98856258930.pdf
    • https://cdn.shopify.com/s/files/1/0437/5340/6618/files/biological_psychology_breedlove_7th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6015/8873/files/chemistry_class_11_chapter_1_notes_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/2476/1507/files/vigowinavedunibasa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0645/1094/files/tarot_reading_with_playing_cards.pdf
    • https://cdn.shopify.com/s/files/1/0440/9432/4888/files/warakawasonupakekov.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_off0000873c.bin
bb134ee5e6b25cb9ebbf48d6d3e2203fe8c240f2aedbf9546b990ed04c7a1de9
pdf-font-stream PDF embedded font (sfnt) at offset 0x873C 5596 bytes
font_01_sfnt_off00009a5a.bin
83329665053c3dbdaa53b5878b5325b566842425b4c4a3fae90afa6e1e7ad6db
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A5A 16192 bytes