Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf3628642f1a5d07…

MALICIOUS

PDF

45.0 KB Created: 2020-09-19 00:30:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcc8d313ef46dd9ce7dfd095e509c5f9 SHA-1: 553c52d2d201712577af908a21da7eb10996b05b SHA-256: bf3628642f1a5d07a663d85620abac8bb1cddc3f00f48d216a9998f6f8b1ba1c
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.me, disguised as a search result. The document body is heavily obfuscated but contains this URL, suggesting a phishing or malware delivery attempt. The presence of numerous other PDF links further indicates a link farm designed to host malicious content or redirect users.

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=que+es+un+procesador+de+textos+ejemplos
    • http://files.annagalatirealtor.com/uploads/1/3/1/4/131452887/rulosoxuzonug.pdf
    • http://files.element3healthclubs.com/uploads/1/3/0/9/130969489/7738065.pdf
    • http://files.mayamuir.com/uploads/1/3/1/4/131454603/wuvumakumibuk-jifegotejakamov-jekazagoxi-lonowuvanodub.pdf
    • http://files.seapoda-arpg.com/uploads/1/3/0/8/130814682/6f08ff170c859fb.pdf
    • http://files.prettiesandcompany.com/uploads/1/3/1/8/131856186/b51a8ae7081307.pdf
    • https://ce335c1d-9c86-4c63-b69d-975351af7a8a.filesusr.com/ugd/e643da_465f937d44374f24b691b4004b05d5a1.pdf?index=true
    • https://f8411f29-a87f-4e99-8195-fef2ab31f777.filesusr.com/ugd/370ea2_5627f22420754c3f969f4e65225b32c4.pdf?index=true
    • https://e3a0fcfc-5912-4f4e-9605-52803bf9e336.filesusr.com/ugd/469aea_487c8ec5c86849e5823820396556f754.pdf?index=true
    • https://1086c353-7212-4eb6-b00e-deadb869c531.filesusr.com/ugd/9e14ca_700463a387a447979ab5a6b25b2ae55d.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0435/2350/6327/files/87692665637.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/notification_access_android_9.pdf
    • https://cdn.shopify.com/s/files/1/0428/5480/9756/files/54287856069.pdf
    • https://cdn.shopify.com/s/files/1/0428/4848/5535/files/famexevivaberijog.pdf
    • https://cdn.shopify.com/s/files/1/0429/3384/6172/files/zoredeb.pdf
    • https://cdn.shopify.com/s/files/1/0428/3577/1558/files/complete_spring_framework_tutorial.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_off00006193.bin
9898ebca68b46986a7ed7a5d4397ec74e9bf9f0a7f5eb3bfbd0f01612f0c2aba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6193 5260 bytes
font_01_sfnt_off00007362.bin
e0c08aa335bcb2cd59cf4d2145f47962bed855485e4d6f47c32de87f4ab5f2e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7362 11168 bytes
font_02_sfnt_off00009769.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9769 4324 bytes

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