Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4956a3c96249b02…

MALICIOUS

PDF

44.8 KB Created: 2020-08-22 01:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d203d7dad21ade9b5a9b8056f8a3938f SHA-1: 2b21d906664fbec8ac60d164cea13dab737d0b57 SHA-256: e4956a3c96249b02f24b45ef1814a6bc26d71a40de5130e72061e1ffddc649da
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains numerous embedded links. One critical heuristic identified a redirector link to 'ttraff.cc', and another identified a link farm hosted on Shopify, suggesting a phishing or malware distribution attempt. The document body contains obfuscated text and a URL that appears to be part of the redirection scheme.

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=if+conditionals+worksheets+pdf
    • http://kenuja.wyliechoir.com/uploads/1/3/1/4/131438572/e3ae66de2d.pdf
    • http://rojove.3dscanarchive.com/uploads/1/3/1/8/131856877/aef95d.pdf
    • http://files.aroyalremembrance.com/uploads/1/3/0/8/130874205/5902458.pdf
    • http://bidalexor.mainewoodsbaseball.com/uploads/1/3/1/3/131383708/1582653.pdf
    • http://files.cornerstonemissionaz.org/uploads/1/3/2/7/132711961/1890542.pdf
    • https://cdn.shopify.com/s/files/1/0431/7682/0890/files/bokolixemev.pdf
    • https://cdn.shopify.com/s/files/1/0431/6931/7020/files/t._i._paperwork.pdf
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/learn_french_with_audio.pdf
    • https://cdn.shopify.com/s/files/1/0439/4716/3806/files/cardiovascular_agents.pdf
    • https://cdn.shopify.com/s/files/1/0430/4843/5861/files/rawuv.pdf
    • https://cdn.shopify.com/s/files/1/0437/0196/0854/files/kegik.pdf
    • https://cdn.shopify.com/s/files/1/0434/1003/0748/files/julatixusoz.pdf
    • https://cdn.shopify.com/s/files/1/0439/2045/7883/files/bmp_to_converter_software.pdf
    • https://cdn.shopify.com/s/files/1/0434/5528/3350/files/wilokiwo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8325/9285/files/diamond_buying_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8032/files/7071661886.pdf
    • https://cdn.shopify.com/s/files/1/0434/1465/1038/files/1569045363.pdf
    • https://cdn.shopify.com/s/files/1/0427/6387/8566/files/kalobezisedexexurixuno.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006412.bin
6f59ca1ebbed350c15a24533015bceb7def7f93eee2119db17b418eaad86c972		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6412 5124 bytes
font_01_sfnt_off00007576.bin
794c6cb9c311cfce06520ec5c04f4a1516615f15e30f82df4dd7823835dab8f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7576 9996 bytes
font_02_sfnt_off000097bc.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97BC 4324 bytes

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