Malicious PDF — malware analysis report

Static analysis result for SHA-256 d05459b34581ea50…

MALICIOUS

PDF

45.9 KB Created: 2020-09-18 09:39:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fcedc347f387b9bed0ec9b5cc8206c3 SHA-1: 0ee32fe9e7f8d7245ff4adb669c1bd52b7402480 SHA-256: d05459b34581ea501272caea0dd2c8af51ad06ffa6e817b441db7fb7c8ef9a84
152 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, masquerading as a recipe, which are designed to redirect users to malicious infrastructure. The primary malicious link identified is https://ttraff.club/wix?keyword=kababayan+bread+recipe, which is flagged as a known malicious redirector. The document also features a link farm, with 28 external PDF links, further indicating a malicious intent to drive traffic to potentially harmful sites.

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.club/wix?keyword=kababayan+bread+recipe
    • http://files.carolheilman.com/uploads/1/3/1/6/131606666/4808988.pdf
    • http://furigufa.inkandoakdesignco.com/uploads/1/3/0/7/130775666/433718.pdf
    • http://bebif.trevorhook.co/uploads/1/3/1/4/131437668/vafer.pdf
    • http://kirumeku.wisconsindronehomes.com/uploads/1/3/2/8/132816066/jowusizape-xasegomiba-bobikubidobo.pdf
    • http://kogugaxu.raffiagifts.com/uploads/1/3/0/7/130775584/49a444816.pdf
    • http://xepore.byboukje.nl/uploads/1/3/1/4/131406390/1427479.pdf
    • http://ximadarof.vargassuarezuniversal.com/uploads/1/3/1/4/131453134/guziwivatofi-rixufexuzupilet-fozapekujezikin-retolobewabe.pdf
    • https://c29e6e36-1d39-4224-9ac8-9d9e9dade90c.filesusr.com/ugd/cafc24_ca9a08a08a614dcd866ffc9a296301aa.pdf?index=true
    • https://5fb42bbe-0e71-4b25-874e-de472cd9eb5a.filesusr.com/ugd/95ea6b_d25047eb73a14cf59c9a9c6a2784debf.pdf?index=true
    • https://e15ded80-ac88-4653-acf4-b3f19c75f453.filesusr.com/ugd/576447_ed5b22a5c1ba434cb7b884f516435d58.pdf?index=true
    • https://15788590-e572-497b-9e39-6ca2e55ed3e4.filesusr.com/ugd/b7306e_f6ff3206350f41fd9943d9a77ac46f6c.pdf?index=true
    • https://76f09a79-6080-4d15-8173-d87de3387604.filesusr.com/ugd/3e0cb9_286391e5181249fd98dd9cc5087c35ac.pdf?index=true
    • https://6c3d9a2d-9445-45dc-a2e4-6afaba3fcc8e.filesusr.com/ugd/1a94e8_415fd7cfdbd540989ac8341d2cefb83c.pdf?index=true
    • https://24d59bb6-9e36-4a52-876a-fd8ce5d71212.filesusr.com/ugd/122077_9de9854e201b4f0d9165e92c21050ee2.pdf?index=true
    • 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_off0000644e.bin
1f35dad117c38d083039d76a65f7c78d2bb9cd5456982a07da6375c23c17f28c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x644E 4664 bytes
font_01_sfnt_off00007425.bin
022f7667092fbc845dfb75e7374e58ecb94d097e175d68b6c008c4ddb0bd7f5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7425 12528 bytes
font_02_sfnt_off00009cf9.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CF9 4324 bytes

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