Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6e4e9e150cd9ce…

MALICIOUS

PDF

42.3 KB Created: 2020-09-02 08:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd2f94603435c66083539ff2f6e3f10b SHA-1: 4581cd069bbe6e6d3d2b3104e0bcfff0aae1bcde SHA-256: eb6e4e9e150cd9ce2e1f338e3d3c1d7c85696c6f789dfabe4b9755fba6e4397c
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to external resources. One critical heuristic firing indicates a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that appear to be part of a link farm strategy, aiming to lure users to click on potentially harmful content.

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.ru/wix?keyword=plant+cell+structure+and+their+functions+pdf
    • https://cdn.shopify.com/s/files/1/0440/8049/6792/files/low_back_pain_physiotherapy_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0430/5852/8405/files/rugok.pdf
    • https://cdn.shopify.com/s/files/1/0430/6118/2617/files/game_bloody_roar_2_ps1_iso.pdf
    • https://cdn.shopify.com/s/files/1/0437/9338/3585/files/govubibabudigoxoforek.pdf
    • https://cdn.shopify.com/s/files/1/0431/3353/4357/files/cvc_words_printable_flash_cards.pdf
    • https://cdn.shopify.com/s/files/1/0430/1520/9123/files/11411810540.pdf
    • https://cdn.shopify.com/s/files/1/0430/7389/6602/files/62034961771.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/caaspp_practice_test_5th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0437/6087/7729/files/ciencia_de_los_materiales_dentales_phillips_completo_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0428/6378/8188/files/fikomidiba.pdf
    • https://static.usrfiles.com/ugd/b8c837_222507c7f79c4b5098767eedd9a08b32.pdf
    • https://static.usrfiles.com/ugd/b7082a_e0e2fab8c6c7446c801aacba0a6e8c1c.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_off000068fb.bin
2eba0352053a6291dcca42dd056463540d682ca4de7dbfe1029d5b7a86f53c10
pdf-font-stream PDF embedded font (sfnt) at offset 0x68FB 5244 bytes
font_01_sfnt_off00007ac9.bin
b59dc1167d5cf13661274377219d130cd6910bb991434b4030282dca327986eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC9 9908 bytes