Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac058cefccdd07c8…

MALICIOUS

PDF

51.5 KB Created: 2020-08-25 14:08:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43fa0db4dbd467fef6ebb3f039fd45fb SHA-1: 28a3d28f37d78678b0b3a619f2f2c8c1c43c8351 SHA-256: ac058cefccdd07c8a39ad71f3b7356c1f81d3777fcfd5ed59ff7bffd0453c0aa
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector infrastructure at https://ttraff.com/pify?keyword=caveat+emptor+and+caveat+venditor+pdf. The document body, though partially garbled, also contains this URL, reinforcing the malicious intent. The presence of many links to external PDFs, including benign ones on Shopify, suggests a link farm designed to obscure the primary malicious destination.

Heuristics 3

  • 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.
  • 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=caveat+emptor+and+caveat+venditor+pdf
    • http://zezog.beautiful-feet.org/uploads/1/3/1/4/131438392/7506917.pdf
    • http://files.trevelle.com/uploads/1/3/2/6/132682235/4880750.pdf
    • http://jemugetud.48kgs.co.uk/uploads/1/3/0/7/130775162/452905e9487ce6.pdf
    • http://files.phoebesfrippery.com/uploads/1/3/1/4/131438419/zijuba-pelonutepomoro-ruzez-peton.pdf
    • http://xenub.bodymindacupuncture.co.uk/uploads/1/3/1/6/131636725/joximan-patuwanoxuwegi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2063/9646/files/52729079798.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tefabojukiva.pdf
    • https://cdn.shopify.com/s/files/1/0431/5240/8742/files/70655285595.pdf
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/71067017865.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2962/files/5988526080.pdf
    • https://cdn.shopify.com/s/files/1/0433/3151/8622/files/bigetezulojamun.pdf
    • https://cdn.shopify.com/s/files/1/0432/5064/7202/files/zupexozomopomomowofa.pdf
    • https://cdn.shopify.com/s/files/1/0437/6811/9445/files/koliledilolut.pdf
    • https://cdn.shopify.com/s/files/1/0433/3702/3641/files/php_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0429/2666/9987/files/famarofonupunobewopixan.pdf
    • https://cdn.shopify.com/s/files/1/0432/8010/5630/files/wolfenstein_enemy_territory_autoexec._cfg.pdf
    • https://cdn.shopify.com/s/files/1/0428/4134/2108/files/pezivafuliti.pdf
    • https://cdn.shopify.com/s/files/1/0433/2797/9678/files/nukadenomig.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d9e.bin
cd231de00b1bda08033536c01e43e28f832da8dc9359d71a76fb838d7fc5e482
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D9E 4964 bytes
font_01_sfnt_off00008e6c.bin
5c882f0a3f4fb17b4d0204500ef2d4b5788c6a9afee7aeacc5a3b9403461af39
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6C 10472 bytes
font_02_sfnt_off0000b252.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xB252 4324 bytes