Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6f0167fc172fa0e…

MALICIOUS

PDF

34.4 KB Created: 2020-08-09 02:47:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74c8255dfaeaca3144c3eea6b5355143 SHA-1: fbb9b44479914f951281c870facfd42586c0da7a SHA-256: f6f0167fc172fa0edf70d8d772e3aef169cee471fff19b5ed751ebb5761394c1
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning tactic. One of the primary links, https://ttraff.ru/pify?keyword=coordinate+plane+practice+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains the same URL, reinforcing the lure. No scripts were extracted, and the PDF structure itself does not indicate further malicious functionality beyond the redirection.

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.ru/pify?keyword=coordinate+plane+practice+pdf
    • http://files.hinsdaleracquetgang.com/uploads/1/3/1/4/131407227/bde8be6e5.pdf
    • http://files.aromaticsalt.com/uploads/1/3/0/9/130969663/zewatiki.pdf
    • http://files.developingfemaleleaders.com/uploads/1/3/1/4/131406800/4652894.pdf
    • http://files.extol.co.nz/uploads/1/3/1/3/131383544/2751241.pdf
    • http://files.curvygirlzplus.shop/uploads/1/3/0/8/130814716/7682149.pdf
    • https://cdn.shopify.com/s/files/1/0434/6026/4086/files/is_11255_part_3.pdf
    • https://cdn.shopify.com/s/files/1/0436/9219/5993/files/fill_in_the_blanks_with_articles_and_prepositions.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/29513669783.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mituvazejuremoposanizama.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/automobile_engineering_notes_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/1701/7243/files/pevufibevire.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/7033221006.pdf
    • https://cdn.shopify.com/s/files/1/0434/8100/6246/files/business_english_activities.pdf
    • https://cdn.shopify.com/s/files/1/0434/0655/7340/files/48791526611.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/investigacin_cientfica_definicin.pdf
    • https://cdn.shopify.com/s/files/1/0432/5765/9547/files/67758431559.pdf
    • https://cdn.shopify.com/s/files/1/0430/5505/5002/files/pagav.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_off00004a03.bin
43b7c414ed40d1b88bbb4d85d5f0f149dbaf5f47c5b9e655f46099132b1ef808
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A03 4876 bytes
font_01_sfnt_off00005aa4.bin
3f014c06dbcd30f03c095a9102124d4a924533f381782cb9d65ea9cc0a191c99
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA4 9496 bytes