Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddfa7b113e31e3ee…

MALICIOUS

PDF

34.8 KB Created: 2020-08-04 16:27:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62dadb01e2a72d1bf3891d808e2e8151 SHA-1: 547dbf31675e5ec2def12aa132959154587e461c SHA-256: ddfa7b113e31e3eeef36314eef54701c163681359de3d1b78c03cde205ab3746
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 pointing to Shopify domains, but one critical link directs to a known malicious redirector at `ttraff.com`. The document body, though heavily obfuscated, contains text related to 'Cambridge igcse physics notes pdf', suggesting a lure to disguise the malicious intent. The primary attack pattern involves redirecting the user to malicious infrastructure via the embedded link.

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=cambridge+igcse+physics+notes+pdf
    • http://files.mouseatheart.net/uploads/1/3/1/4/131437074/1651426.pdf
    • http://files.aimeetayagphotography.com/uploads/1/3/1/4/131438265/eb40f35f0c.pdf
    • http://files.kevinsdeli.com/uploads/1/3/1/3/131381679/gamavotijow.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mupesoxozuwimufuvijolus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78992801071.pdf
    • https://cdn.shopify.com/s/files/1/0440/3894/6981/files/bisuleramuviwesobabufopar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76102764406.pdf
    • https://cdn.shopify.com/s/files/1/0434/4764/8406/files/94477145961.pdf
    • https://cdn.shopify.com/s/files/1/0448/3471/7858/files/environmental_risk_definition.pdf
    • https://cdn.shopify.com/s/files/1/0437/6150/0309/files/72787337576.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2854/files/australian_calorie_counter_chart.pdf
    • https://cdn.shopify.com/s/files/1/0431/0918/7750/files/28021912896.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5266/files/witagukinojalolarobagep.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_off00004838.bin
5f7b4aa56b0bca28b232bff9dbf3ad65eebb3cb45b68b40a21e5e5ab40f94f32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4838 5684 bytes
font_01_sfnt_off00005b5e.bin
281c32b72a48e7ed4afe8496c683cca57624c7c0bbfdcb30b7c5f0d2e974b39c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5E 9864 bytes

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