Malicious PDF — malware analysis report

Static analysis result for SHA-256 35aeb5e2400cb8ef…

MALICIOUS

PDF

44.0 KB Created: 2020-08-03 09:14:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a119b7686b40c4132ebf4e30e5104157 SHA-1: a2f6c755ba2a3af38511295aafd7d69e84692114 SHA-256: 35aeb5e2400cb8ef4677251f3c6bde668977392f357a4615814e0a5fb4c9a602
150 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which likely serves as a lure. Another critical heuristic indicates a PDF link farm, with many links pointing to Shopify domains, suggesting an attempt to manipulate search results or distribute content. The presence of these link farms and the redirector points to a malicious distribution or SEO poisoning campaign.

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.cc/pify?keyword=big+sean+idfwu
    • http://files.ka-bloomgroup.com/uploads/1/3/1/3/131398323/7560275.pdf
    • http://files.karinridgers.me/uploads/1/3/2/6/132681812/kipuxisaxajalabise.pdf
    • http://files.mapced.org/uploads/1/3/0/7/130776131/giwokujedomuva.pdf
    • http://teribe.avian.dk/uploads/1/3/1/4/131407178/disapuji.pdf
    • http://files.bristoldoughnut.co/uploads/1/3/1/1/131164002/2596418.pdf
    • https://cdn.shopify.com/s/files/1/0428/6650/7942/files/quando_quando_quando_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3816/files/videdetokawemopuxel.pdf
    • https://cdn.shopify.com/s/files/1/0431/5421/0980/files/18755748293.pdf
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/4251399701.pdf
    • https://cdn.shopify.com/s/files/1/0436/3006/7865/files/sda_bible_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/6224/7080/files/zokeboxinorubi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1769/1559/files/25015998073.pdf
    • https://cdn.shopify.com/s/files/1/0432/9259/0236/files/zokolibudikol.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gofifarigomikidapowokov.pdf
    • https://cdn.shopify.com/s/files/1/0437/4324/8533/files/upper_level_ssat_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/7193/8461/files/18433745780.pdf
    • https://cdn.shopify.com/s/files/1/0431/1931/3053/files/zujotetuxejenifeso.pdf
    • https://cdn.shopify.com/s/files/1/0437/8581/4173/files/tarokupijufixisamasota.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_off00006eae.bin
57feb33fdf1157f464b5947039c99608f51a0ccac5fe94ab5ca6f5c9d5bf4850
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAE 5088 bytes
font_01_sfnt_off0000802f.bin
7df3c1967e90922f90805b69a1fc0766a48aea77f7cc548c7b85743e32485208
pdf-font-stream PDF embedded font (sfnt) at offset 0x802F 10204 bytes