Malicious PDF — malware analysis report

Static analysis result for SHA-256 b35325ea1958dd97…

MALICIOUS

PDF

64.3 KB Created: 2020-08-07 03:13:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87c717e9163532345863f5ab418a97f5 SHA-1: a09d0d3e01c854ebe89e4ad20fcd805a39492523 SHA-256: b35325ea1958dd977e9908ff2670aa5b632efccbcfb4353e39814caa5f90a2ef
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.com/pify?keyword=insertion+sort+in+data+structure+with+example+pdf'. This suggests a phishing or scam attempt, likely aiming to redirect users to malicious content. The document body, though heavily obfuscated, contains this URL and other Shopify links, some of which are confirmed benign, but the presence of the malicious redirector is the primary indicator of compromise. No scripts were extracted from this sample.

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=insertion+sort+in+data+structure+with+example+pdf
    • http://files.divorcecoachingandconsulting.com/uploads/1/3/0/8/130874518/bejam-soselovorifat-tekumubobup-powidonuvewadar.pdf
    • http://files.buildingleadersforsuccess.com/uploads/1/3/0/8/130874480/rivanopuveduna.pdf
    • http://files.ecct1868.org/uploads/1/3/1/6/131637402/4666520.pdf
    • http://files.davidgarms.com/uploads/1/3/0/7/130740524/nizufoninawezareri.pdf
    • https://cdn.shopify.com/s/files/1/0437/6995/4456/files/xizenasoripanasux.pdf
    • https://cdn.shopify.com/s/files/1/0441/2401/2696/files/506_assignment_answer_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0436/0224/7838/files/29879577863.pdf
    • https://cdn.shopify.com/s/files/1/0435/4523/1519/files/mcmi_iii_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/34168484544.pdf
    • https://cdn.shopify.com/s/files/1/0434/9824/2214/files/86809493522.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/62249244937.pdf
    • https://cdn.shopify.com/s/files/1/0431/4211/9592/files/physiology_books_for_mbbs.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/66806395411.pdf
    • https://cdn.shopify.com/s/files/1/0430/6547/5229/files/60146044597.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekosipavejidowusa.pdf
    • https://cdn.shopify.com/s/files/1/0432/5654/5433/files/54479392316.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000089ef.bin
2177a9b4646c26320b44d0bee73daab34a5668e80dd0b4dc30ef57f7084d2681		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89EF 5372 bytes
font_01_sfnt_off00009c19.bin
198c140236ef94761a581a8fce4c6a52c05495a5374ee2e2a4eb14292c85edbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C19 16056 bytes
font_02_sfnt_off0000cdf8.bin
f8c9e7dd368a75da86b66dc164f776a1206bfd52fa73a24dccf6f58fdb15a864		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF8 16100 bytes
font_03_sfnt_off0000e2cc.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CC 4324 bytes

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