Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd3bec528e677727…

MALICIOUS

PDF

60.1 KB Created: 2020-08-18 20:28:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8772ca19e47a83a14a3097bc5f619539 SHA-1: 4766032d16f686b2180415426cc8b3b0dbd02861 SHA-256: dd3bec528e6777274cfb591e3e7fb8fbfd84c1c9295bbbc7ceca30a9bc2357e0
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=bairavi+rajini+songs'. This URL is likely part of a phishing campaign or a malware distribution scheme. The document also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO link farm abuse. The document body itself is heavily obfuscated but contains the same redirector URL and a reference to 'wkhtmltopdf', suggesting it was generated programmatically to host these links.

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.cc/pify?keyword=bairavi+rajini+songs
    • http://files.dayofgrace.org/uploads/1/3/0/8/130814432/6342674.pdf
    • http://files.aspiringmindsfw.com/uploads/1/3/1/4/131437636/vaxosusikir.pdf
    • http://files.vcrhm.org/uploads/1/3/1/4/131453214/toxokado.pdf
    • https://cdn.shopify.com/s/files/1/0435/6240/1947/files/10243213845.pdf
    • https://cdn.shopify.com/s/files/1/0429/4764/1511/files/36449286725.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mabiwabupo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2370/3969/files/kimekivekatawo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9881/6150/files/56925745366.pdf
    • https://cdn.shopify.com/s/files/1/0432/3993/2064/files/download_turn_down_for_what.pdf
    • https://cdn.shopify.com/s/files/1/0432/4114/4483/files/zaburzenia_psychiczne_i_emocjonalne.pdf
    • https://cdn.shopify.com/s/files/1/0432/4625/6295/files/human_genetics_mcq.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/84300802996.pdf
    • https://cdn.shopify.com/s/files/1/0430/7088/1946/files/fefoxetulotamefaxap.pdf
    • https://cdn.shopify.com/s/files/1/0437/6847/9898/files/trastorno_esquizofrenia_paranoide.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/tabixitijiduwet.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_off00007b49.bin
461ac92916cd8f362ff4dda1283235641e984fc76ff8a0db639ae08ee2117f8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B49 5008 bytes
font_01_sfnt_off00008c65.bin
68281fb6a67fbdb229c88ecee0de97bff6a8ab61098bc3566ad3adc16b6fbf79
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C65 10140 bytes
font_02_sfnt_off0000a7da.bin
42da117e28b273b3e0b91fef4e9d1372d3a4cfb96cc1b1a713f5d019252fb5ed
pdf-font-stream PDF embedded font (sfnt) at offset 0xA7DA 6388 bytes
font_03_sfnt_off0000bf12.bin
2f2a25d207b00a08a316d37baf9dac4e75316f8562d52690686d64a56e5d2b4d
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF12 10380 bytes