Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0828ff34b236ad9…

MALICIOUS

PDF

50.6 KB Created: 2020-08-09 05:29:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c7a2643f70dec9730e6c7a6d8fd1d3e SHA-1: 2d6509c59f3143d107127e0bc806f7a28956a69c SHA-256: d0828ff34b236ad92a50d822c0e287b9fd0852d4e6ccad74d90b80700e0568d6
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.com'. This suggests a link farm or SEO poisoning tactic designed to drive traffic to malicious infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=bulk+density+test+pdf', reinforcing the malicious intent. The primary goal appears to be directing users to malicious content via these embedded 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.com/pify?keyword=bulk+density+test+pdf
    • http://files.impact-gymnastics.com/uploads/1/3/1/4/131438523/63f657b.pdf
    • http://files.esparzafc.com/uploads/1/3/1/4/131407029/1508343.pdf
    • http://files.ruthmaryjohnson.com/uploads/1/3/1/6/131606291/sezevujatida.pdf
    • http://tanowu.oceanstonelandscapes.com/uploads/1/3/1/4/131409090/wifijarunem-betekabafi-soxig-nexedisusitika.pdf
    • https://cdn.shopify.com/s/files/1/0431/5673/4109/files/85117475086.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9030/files/gmat_sample_test.pdf
    • https://cdn.shopify.com/s/files/1/0438/4007/7981/files/18563594947.pdf
    • https://cdn.shopify.com/s/files/1/0433/4511/7342/files/89213273400.pdf
    • https://cdn.shopify.com/s/files/1/0439/0413/9416/files/38421081478.pdf
    • https://cdn.shopify.com/s/files/1/0434/6013/3031/files/aashto_flexible_pavement_design.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/the_lexical_syllabus_a_new_approach_to_language_teaching.pdf
    • https://cdn.shopify.com/s/files/1/0433/1238/2116/files/bodybuilding_exercises_plan.pdf
    • https://cdn.shopify.com/s/files/1/0432/4360/2080/files/health_and_physical_education_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/ruwanedemuter.pdf
    • https://cdn.shopify.com/s/files/1/0433/2175/3758/files/12132539162.pdf
    • https://cdn.shopify.com/s/files/1/0438/4718/8640/files/rimanobivewuxesenililid.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_off00008aa2.bin
c44e5f99a1098c755aa37fb166b55d0089109ac7efaee0ba5832604cf7f58238
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA2 4944 bytes
font_01_sfnt_off00009ba0.bin
1cca40f972fe4692282d5080effe0e69118e0976ecebc3133c1ebc2208344e2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BA0 10088 bytes