Malicious PDF — malware analysis report

Static analysis result for SHA-256 d135032d7c9c0b91…

MALICIOUS

PDF

42.4 KB Created: 2020-09-20 00:24:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efa99ee0612cc56c783035f998878711 SHA-1: 0d27f36915339ba7f011df4a03a59120b7aa995c SHA-256: d135032d7c9c0b91d9ad8a887161362bbc26de82cf762b6f7c31f7c56597897d
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.club, which is designed to lure users into clicking on further malicious links. The document body, though heavily obfuscated, contains text related to 'bulk baby bottles for baby shower' and the malicious URL, suggesting a social engineering lure. The presence of numerous embedded links, many pointing to benign Shopify URLs but one to a malicious redirector, indicates a link farm strategy to obscure the final malicious destination.

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=bulk+baby+bottles+for+baby+shower
    • https://6df7fdb1-f4ff-45f2-b786-fabf9970a0f7.filesusr.com/ugd/45fd81_34deaad1740f4143aac1f72b67ac6d57.pdf?index=true
    • https://285d7fd2-8f73-4ccc-9e03-52cb72b0b0d8.filesusr.com/ugd/3d7af5_6b6c49994fbb45b1a5f8b9f2433f3e65.pdf?index=true
    • https://ac76d47f-73b6-418b-9ab8-dbcc034ca825.filesusr.com/ugd/55f640_e469465b495041c39696d2e2ebbec03b.pdf?index=true
    • https://efaf8d0f-3265-44d4-af53-e584144a96c1.filesusr.com/ugd/5c9621_7c3d50a1746a4d48998bfff8610b51fd.pdf?index=true
    • https://ea12043a-95fa-41a1-b162-6121fa9f7624.filesusr.com/ugd/b96e41_a01696dd009a4d29a4512f2067c541a9.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0435/3458/1911/files/vumalexutewi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9130/4343/files/58275183472.pdf
    • https://cdn.shopify.com/s/files/1/0436/9245/8152/files/xagupini.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6818/files/8009202059.pdf
    • https://cdn.shopify.com/s/files/1/0488/1485/0213/files/84436673833.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0903/files/wupubelubipakuzopumaw.pdf
    • https://6ee30a69-fd65-4223-9ac0-d18726852a18.filesusr.com/ugd/4fb05f_5b3a3ca2347f462ca84b742d160d5232.pdf?index=true
    • https://b151404f-763c-4421-a381-0adce2bdec6a.filesusr.com/ugd/0cd019_d94c8f6e2b034b3f83c513879e3c928c.pdf?index=true
    • https://62b4a74a-ee33-4e3a-b82c-1dc9716360cc.filesusr.com/ugd/769f78_d4cb18a725a34bd19af74d93518c0ff3.pdf?index=true
    • https://2d0164e8-bf51-4351-89fe-b6ee77639165.filesusr.com/ugd/dba42a_10d579f171db47fbac71864ef2f00b5c.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006781.bin
a80c1880d05e601348f8834de7c74561ad7a90a576f1e78d61ec84a31967ccb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6781 5304 bytes
font_01_sfnt_off000079a5.bin
de31ccfd8707be1d8adefb542f24012cb1baf9c451d2b76717b750e38c26742f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79A5 10284 bytes

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