Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fc1bc2a289d3fc5…

MALICIOUS

PDF

42.7 KB Created: 2020-08-06 22:19:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57c7dfc14c0a09f161711ea839098a2d SHA-1: deb2c8b8b4a7836eaf0a53920ba86a5c7bfa23df SHA-256: 9fc1bc2a289d3fc58529a786ee1021f071eda239b7f706f45269165feb3da0fe
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=design+thinking+worksheet+pdf'. Additionally, it exhibits a PDF link farm heuristic, with numerous links pointing to Shopify domains, one of which is 'https://cdn.shopify.com/s/files/1/0431/2412/9946/files/1481340391.pdf'. The presence of a visual download button lure further supports the malicious intent.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=design+thinking+worksheet+pdf
    • http://files.midwestfarmandpet.com/uploads/1/3/1/8/131860787/lomifukevirotosi.pdf
    • http://files.juliahrueckert.com/uploads/1/3/0/8/130814106/vitekusodiw.pdf
    • http://monaf.alphaspartannutrition.com/uploads/1/3/2/7/132741555/nigometatubajiromija.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9946/files/1481340391.pdf
    • https://cdn.shopify.com/s/files/1/0431/6486/0575/files/vufezidumuzutarokijuzix.pdf
    • https://cdn.shopify.com/s/files/1/0428/5041/8847/files/bojenisoriremapuxefuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/5480/9759/files/vizufuguvifebasit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33647917740.pdf
    • https://cdn.shopify.com/s/files/1/0430/8477/5577/files/wunolalojusukogotaxekeket.pdf
    • https://cdn.shopify.com/s/files/1/0445/9456/1188/files/bursitis_hip_stretches.pdf
    • https://cdn.shopify.com/s/files/1/0429/1582/3772/files/23409478621.pdf
    • https://cdn.shopify.com/s/files/1/0435/3759/6575/files/691353496.pdf
    • https://cdn.shopify.com/s/files/1/0431/0827/0244/files/ammonia_vapour_absorption_refrigeration_system.pdf
    • https://cdn.shopify.com/s/files/1/0428/6958/8124/files/mamasudovurikipimog.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_off0000678b.bin
6cccab4ec0a59a89d09dd17757a1688246d0b4c6d530d81bceb43e3c461d9308		 pdf-font-stream PDF embedded font (sfnt) at offset 0x678B 5216 bytes
font_01_sfnt_off00007962.bin
df59862227ab0508698dfb2947f870cdbc0bc01948417e17d2755cb4e741d24d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7962 10812 bytes

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