Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3e3094b25a33ced…

MALICIOUS

PDF

41.9 KB Created: 2020-08-03 03:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fe621527a50bb700ae9c5b440e4ed98 SHA-1: 6a862a50c0f1d7b3ed694c5df13fa8d7aacb8138 SHA-256: c3e3094b25a33ced0c8b45ea98a064c777ee696aa98c697a610042aadc75d176
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document was flagged as malicious due to a critical heuristic identifying it as a redirector link to known malicious infrastructure. It also contains a mass external PDF link farm, with many links pointing to benign Shopify URLs but several pointing to unknown domains. The primary malicious URL identified is https://ttraff.cc/pify?keyword=2+phones+lyrics+clean, which is likely used to redirect users to a phishing or malware distribution site. The document body contains garbled text and a reference to the malicious URL, further supporting the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=2+phones+lyrics+clean
    • http://files.krecklaugermanshorthairs.com/uploads/1/3/1/3/131383318/xugotaxabidemapemo.pdf
    • http://files.bcimc.info/uploads/1/3/1/3/131398022/cff32542dfc9.pdf
    • http://files.marinacoveconsulting.com/uploads/1/3/0/9/130969790/9362066.pdf
    • http://files.deannalsletten.com/uploads/1/3/1/4/131455328/linudavozo.pdf
    • http://files.positiveposturenz.com/uploads/1/3/1/4/131483550/sivaf_polatafi_zuwovil.pdf
    • https://cdn.shopify.com/s/files/1/0434/6383/5814/files/90572036682.pdf
    • https://cdn.shopify.com/s/files/1/0428/9580/2527/files/84630259866.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/28101726073.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sefumiwizekoreletete.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/cooking_training_runescape.pdf
    • https://cdn.shopify.com/s/files/1/0434/5511/9512/files/tesudugagoxudaberiti.pdf
    • https://cdn.shopify.com/s/files/1/0433/9544/8997/files/33837458315.pdf
    • https://cdn.shopify.com/s/files/1/0434/5040/0920/files/57819432867.pdf
    • https://cdn.shopify.com/s/files/1/0439/0119/0299/files/74402115419.pdf
    • https://cdn.shopify.com/s/files/1/0439/5093/2123/files/damigojosuf.pdf
    • https://cdn.shopify.com/s/files/1/0436/5841/2185/files/butterfly_kyodai_2.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_off00006508.bin
184787f9c8fac2f4ab25d5b717c80f0ae73578dbb2bcdcea8beac1f888f3754e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6508 5160 bytes
font_01_sfnt_off00007694.bin
b5ac3745633ac3ad0e312679cf84e6a61876840d96f4f250645e88a61f3fdb63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7694 10580 bytes

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