Malicious PDF — malware analysis report

Static analysis result for SHA-256 df6c07fb60bb38b1…

MALICIOUS

PDF

44.7 KB Created: 2020-08-08 19:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a71e0de042295e1919a700c20a1a8592 SHA-1: 5fefbae92c1b96e93f72ff36461e4df20b747b1e SHA-256: df6c07fb60bb38b1323d9e9dce9659256c0c95f2ecf9e17746c09df528c310a5
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a large number of embedded links, many of which are part of a link farm likely intended for SEO manipulation or to redirect users to malicious content. The primary malicious redirector URL is https://ttraff.ru/pify?keyword=alkenes+pdf+download. While no scripts were extracted, the sheer volume of links and the critical heuristic firings strongly suggest a malicious intent, likely to lure users to compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=alkenes+pdf+download
    • http://defoxaju.mgetsinslp.com/uploads/1/3/1/0/131070152/9945765.pdf
    • http://files.brightlikeblack.com/uploads/1/3/1/0/131070452/poveraxiw-pewalaru-tuduj.pdf
    • http://files.wisebloodbooks.com/uploads/1/3/1/4/131454262/tewumererovebip-rakijizuziris.pdf
    • http://jasotewe.cherylreed.net/uploads/1/3/1/0/131070109/dofiwaw_mokanelebegul_xutovoparam_kelinakujoge.pdf
    • https://cdn.shopify.com/s/files/1/0437/0087/9510/files/506_assignment_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/38442792030.pdf
    • https://cdn.shopify.com/s/files/1/0441/0051/8040/files/bukotirepuwerila.pdf
    • https://cdn.shopify.com/s/files/1/0432/5684/0350/files/filumukadusigewabu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0485/4426/files/venom_song_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0428/3170/8316/files/pubulolud.pdf
    • https://cdn.shopify.com/s/files/1/0433/0101/1611/files/67386393402.pdf
    • https://cdn.shopify.com/s/files/1/0432/4828/7904/files/60852103190.pdf
    • https://cdn.shopify.com/s/files/1/0433/7562/4350/files/68346206356.pdf
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/51742144392.pdf
    • https://cdn.shopify.com/s/files/1/0428/8898/6787/files/leduriz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45035229099.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/
    • https://cdn.shopify.com/s/files/1/0433/7562/4350/files/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000649a.bin
9468ce8f5a3a6685687bd7f889fb181f7df49d3ef9e0adedcf3979aa3e551e41
pdf-font-stream PDF embedded font (sfnt) at offset 0x649A 4744 bytes
font_01_sfnt_off000074d5.bin
36deae13c2a80354a4dd0c4012286ea1d201cb1af667ba7cb4b8984ec09ecadb
pdf-font-stream PDF embedded font (sfnt) at offset 0x74D5 10192 bytes
font_02_sfnt_off000097bc.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x97BC 4324 bytes