Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ec38cd888b62ec…

MALICIOUS

PDF

36.9 KB Created: 2020-09-01 03:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c702e68a2fb2709f0d6813039e00ddb2 SHA-1: ea7eb11117485d135ade7ebea0f6c533ff2e7408 SHA-256: e5ec38cd888b62ec6952501bf3bd5044a3b3a3e84d054e33c4f505b1baf0b646
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that, when clicked, redirects to a malicious URL. The document body text and embedded URLs suggest a lure for downloading a game, specifically 'Call of Duty apk'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the redirection to known malicious infrastructure.

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=call+of+duty++apk
    • https://static.usrfiles.com/ugd/c0b427_498daeb4927342c0a0bba28ee0ca094c.pdf
    • https://static.usrfiles.com/ugd/bf0735_1c8159abfc8f482aa23f46452a29dedd.pdf
    • https://static.usrfiles.com/ugd/74a852_319617c653a94285bf327a4256950e7d.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/54791769146.pdf
    • https://cdn.shopify.com/s/files/1/0430/8713/4882/files/93972458734.pdf
    • https://cdn.shopify.com/s/files/1/0436/1483/0749/files/abacavir_hypersensitivity_case_report.pdf
    • https://cdn.shopify.com/s/files/1/0448/6758/4162/files/vmware_for_ubuntu.pdf
    • https://cdn.shopify.com/s/files/1/0439/2363/6379/files/celta_course_material.pdf
    • https://cdn.shopify.com/s/files/1/0437/7978/4866/files/napusoluwedulafubiko.pdf
    • https://static.usrfiles.com/ugd/b8c837_c05f146b81c2431ca25b7161eda455d1.pdf
    • https://static.usrfiles.com/ugd/cb2bed_80c56a448194410a87ef4afa5404e8ff.pdf
    • https://static.usrfiles.com/ugd/7c30af_b4831e720ce349248d98f5b5d61fb88a.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_off0000526f.bin
91f870f12659cad3a4d44125a37addaee956da869e5eb3cf08c0cf63c96223b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x526F 4832 bytes
font_01_sfnt_off00006306.bin
ccacee0d7de4b387d3a281462d958e182f3543c52bb705dc425020316c865bd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6306 10604 bytes

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