Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b2c1c048751c424…

MALICIOUS

PDF

47.7 KB Created: 2020-09-05 11:41:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42c96187fefbb55d1a08aa6a8e93b27b SHA-1: 37f1d3da8613e16544c456d97587c9a3e9a751c6 SHA-256: 5b2c1c048751c424a2317fc8f79877c4da6c02ed1f18efa0845c5fca0f10f0b9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=anglo+saxon+house+model+template'. It also exhibits characteristics of a link farm, with numerous embedded URLs. The ML classifier strongly indicates maliciousness, suggesting the document is designed to redirect users to harmful content, likely for phishing or malware delivery.

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.me/wix?keyword=anglo+saxon+house+model+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://static.usrfiles.com/ugd/e78b77_8022a6acd083458fa760231874a6614f.pdf
    • https://static.usrfiles.com/ugd/b09e1d_0d56388f68404d6999d152c7d99e3801.pdf
    • https://static.usrfiles.com/ugd/3cb679_a52de73bf67645f69a96d34ce91ea399.pdf
    • https://static.usrfiles.com/ugd/85d67f_b722a0f0881a4cf69e4763cb09a92d23.pdf
    • https://static.usrfiles.com/ugd/bf07b1_6dc49e5aea8c448abdc2a0662a90e554.pdf
    • https://static.usrfiles.com/ugd/1f5cef_8887711accdd4221b04afca16c1a4e8c.pdf
    • https://static.usrfiles.com/ugd/82e28d_c17d882b8923447296ee5e79ef5f2e19.pdf
    • https://static.usrfiles.com/ugd/b8c837_0eb3a93c1f1a424090ce6f63b8e968f0.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_31aed890e1bf466fa7b5f4c779e30190.pdf
    • https://static.usrfiles.com/ugd/bfbc46_d6f486767cd04aabb6994f392fa5e7fe.pdf
    • https://cdn.shopify.com/s/files/1/0433/7297/0133/files/2771598381.pdf
    • https://cdn.shopify.com/s/files/1/0464/7957/3160/files/osmosis_and_diffusion_lab_question_answers.pdf
    • https://cdn.shopify.com/s/files/1/0452/6263/5168/files/54167387581.pdf
    • https://cdn.shopify.com/s/files/1/0434/6344/2598/files/22314947272.pdf
    • https://cdn.shopify.com/s/files/1/0428/7866/4867/files/30717711793.pdf
    • https://cdn.shopify.com/s/files/1/0461/9832/5399/files/danedexu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5757/8138/files/acca_f5_syllabus_and_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bisadugizutojaririxenudep.pdf
    • https://cdn.shopify.com/s/files/1/0437/1211/8952/files/minecraft_education_edition_apk.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069e9.bin
092ac84a1066dee5acdfa603b9c74d01730dbb0af78098bc01af490dd2c388a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E9 5332 bytes
font_01_sfnt_off00007bf2.bin
8b0a12d1e929439f76261e95a414d75e1d48fd52f5ffb42a1cbf4dc18f226312		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF2 10448 bytes
font_02_sfnt_off00009fe8.bin
361c47dd4b9392d828427cefde6392d8a0a3a9a75e9270ffbfb71dffd2f7fbf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FE8 4584 bytes

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