Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee5dca1414267d9d…

MALICIOUS

PDF

45.5 KB Created: 2020-08-25 22:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5d6bb9459a3130ae0d21066bac9de57 SHA-1: 7ef4f67efbd4a86461f648c19c4e823085838cff SHA-256: ee5dca1414267d9dc9639a2d91d89ed6eb6bd7f92eb09adb33646eb12e9defd3
152 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, with numerous embedded URLs. A critical heuristic identified a redirector link pointing to 'ttraff.cc', which is known malicious infrastructure. The majority of the links point to Shopify domains, likely serving as a temporary hosting for the malicious content before redirecting to the final malicious destination. The ML classifier strongly supports the malicious nature of this PDF.

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=ciencias+auxiliares+de+la+biologia+y
    • http://files.3531developments.com/uploads/1/3/2/3/132303035/b2f1697.pdf
    • http://pifusifu.janeincolour.com/uploads/1/3/0/9/130969060/5248196.pdf
    • http://files.lions105ce.org/uploads/1/3/1/6/131607029/gigufitexan_jitagusasebog_sixusuvurer.pdf
    • http://files.katienellegregory.com/uploads/1/3/2/6/132695455/7540000.pdf
    • http://files.yvcjoplin.org/uploads/1/3/0/8/130813934/74b43108.pdf
    • https://cdn.shopify.com/s/files/1/0432/3662/2498/files/54674667141.pdf
    • https://cdn.shopify.com/s/files/1/0436/3055/9390/files/arquitectura_barroca_en_inglaterra.pdf
    • https://cdn.shopify.com/s/files/1/0432/5838/0446/files/mexixapuxesakakozopa.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/phil_collins_discography.pdf
    • https://cdn.shopify.com/s/files/1/0427/5660/4070/files/85851615131.pdf
    • https://cdn.shopify.com/s/files/1/0428/0667/3575/files/nikadirekarisizaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0971/2023/files/dujime.pdf
    • https://cdn.shopify.com/s/files/1/0431/0053/6986/files/79779409493.pdf
    • https://cdn.shopify.com/s/files/1/0433/3885/8650/files/nupanitigujexovadidoxovem.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuwotowomezi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0839/files/43039660446.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5013/files/siziximazi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8860/1503/files/59863988116.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_off000070e1.bin
76c7b06b1c8d736f2fd4efa88fce6de04b44a2605fc904ddc70633d96f1a3e6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E1 5320 bytes
font_01_sfnt_off00008301.bin
c3c3d00ad7845df428408a87e40c9490f8b9993642150778f157341f7d2f6702		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8301 11132 bytes

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