Malicious PDF — malware analysis report

Static analysis result for SHA-256 584c0cd52924d35f…

MALICIOUS

PDF

48.3 KB Created: 2020-09-17 01:13:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db892e12b5eed9d0b1d45cae49fcf24e SHA-1: c60dec4ed3f186904d75088917c555f9da5386ab SHA-256: 584c0cd52924d35f8d273567b5c0f2537ecabdf91461a5ab690335842f2724bc
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a significant number of embedded URLs pointing to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. One URL, 'https://ttraff.me/wix?keyword=dragon+reference+sheet+deviantart', is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated and contains some of the URLs, suggesting an attempt to disguise the malicious links.

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=dragon+reference+sheet+deviantart
    • http://pizowod.kccsvg.org/uploads/1/3/0/8/130873947/temumezo-mazapafumidor-jizozadiferep-vipokisitelu.pdf
    • http://files.thepeachyflynn.com/uploads/1/3/0/7/130775106/nisuxejaj.pdf
    • http://files.hannmfg.com/uploads/1/3/1/4/131454620/vubiri.pdf
    • http://files.ahealthyhomeplus.com/uploads/1/3/0/8/130814586/zopodi.pdf
    • http://files.techsun-breakrooms.com/uploads/1/3/1/3/131379622/b84ae.pdf
    • https://593ef88d-d2dc-4205-8fed-71d7a4cc4dfc.filesusr.com/ugd/cb4a18_6cbae417023242bcbadd9634299362a3.pdf?index=true
    • https://3ae50aa4-bc4c-4fee-a7d3-58cc8058c86a.filesusr.com/ugd/55e2c6_49381f85a9ed4494a385e09fa110f4ff.pdf?index=true
    • https://dcc896ac-48c0-4738-8a50-c4fc63c81c33.filesusr.com/ugd/12daa7_8d56064547924fc7925278869364c377.pdf?index=true
    • https://a209ab5d-35ce-4081-bd3d-5e43675dbbbf.filesusr.com/ugd/0286dd_e30c3661764f403d8601a3ca345ff7e5.pdf?index=true
    • https://8fd54a8d-8226-4abc-b058-f69ac76b0c2a.filesusr.com/ugd/98e2de_58a287f1fb2d4ba6b3b2d11273a6ffba.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0430/0275/7281/files/94374174226.pdf
    • https://cdn.shopify.com/s/files/1/0431/1718/3130/files/probability_theory_and_random_processes_by_peebles.pdf
    • https://cdn.shopify.com/s/files/1/0484/7570/1409/files/jenivinagezopexonu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6726/8517/files/68656142627.pdf
    • https://cdn.shopify.com/s/files/1/0459/1678/2741/files/zuxam.pdf
    • https://cdn.shopify.com/s/files/1/0431/0754/9338/files/new_ethiopian_film.pdf
    • https://cdn.shopify.com/s/files/1/0438/3460/5730/files/find_and_replace_google_sheets.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_off00006882.bin
66006e8bdcc33c9f61c53a2cdd189c11fdaebf7e2f2a9d8db9d0d689ccf7ea52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6882 5308 bytes
font_01_sfnt_off00007a9c.bin
325141e428870e883fcfd972f57457505aebb5f962ccc5d9d69871a63cfed436		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9C 10652 bytes
font_02_sfnt_off00009f38.bin
35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F38 16036 bytes

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