Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6bdd9737d465bcd…

MALICIOUS

PDF

44.3 KB Created: 2020-07-25 22:02:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f493f651a820bc24ff2d432d3b47d27 SHA-1: eaddd02cddbee559a0579380ea71d64251b5bbfa SHA-256: b6bdd9737d465bcd1f672537c74fb72de87f8d8e70ad346d80e9a84ff46057e3
128 Risk Score

Malware Insights

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

The PDF file contains a link farm with 18 external PDF links, many pointing to Shopify domains, and one critical heuristic firing indicates a link to known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Cinema apk ad free', suggesting a lure for potentially unwanted or malicious software. The presence of a visual download button heuristic further supports the social engineering aspect of this attack.

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=cinema+apk+ad+free+1.+4.+3
    • http://files.nightskybooks.com/uploads/1/3/2/8/132815785/9479880.pdf
    • http://files.genewhitacrecpa.com/uploads/1/3/1/8/131858287/tejotufaf.pdf
    • http://files.sjosephpsychotherapy.com/uploads/1/3/0/7/130740591/663039.pdf
    • http://files.hooversfarmsupply.com/uploads/1/3/0/9/130969334/2026091.pdf
    • http://files.twindphoto.com/uploads/1/3/1/0/131070192/zowafo_kofuvebepe_zuzorewikoso_kevezoganari.pdf
    • http://files.twindphoto.com/uploads/1/3/1/0/131070192/zowafo_kofuvebepe_zuzorewikoso_kevez
    • https://cdn.shopify.com/s/files/1/0431/7062/7735/files/27606448950.pdf
    • https://cdn.shopify.com/s/files/1/0432/4904/1563/files/35885967041.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/reguvibatofodusiboli.pdf
    • https://cdn.shopify.com/s/files/1/0428/9078/9027/files/86925450273.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/35979902855.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zaduvezumutup.pdf
    • https://cdn.shopify.com/s/files/1/0432/8741/2900/files/45524990210.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7300/files/kegirexoxag.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/benubojebexoreloruva.pdf
    • https://cdn.shopify.com/s/files/1/0432/0890/0768/files/juvaguwegilobiwuxojos.pdf
    • https://cdn.shopify.com/s/files/1/0433/8614/2876/files/94252552677.pdf
    • https://cdn.shopify.com/s/files/1/0429/3846/6467/files/32519914974.pdf
    • https://cdn.shopify.com/s/files/1/0429/4384/0412/files/lavufitorip.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_off000070a0.bin
7e4eb6b6239a03b27706a50320c81e382b548c952361e31b1d9c67d50d688f1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x70A0 4996 bytes
font_01_sfnt_off0000818d.bin
804fe2dd9e1dbddd95601e3442d02602636538a21772a65305ac1ac34863c566
pdf-font-stream PDF embedded font (sfnt) at offset 0x818D 10068 bytes