Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e024382a7f19b32…

MALICIOUS

PDF

35.4 KB Created: 2020-09-01 04:08:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfbc053a39ea9c39d0d794d1bcd1b343 SHA-1: 242cb3e1ee1e123c4a2a8ef3f4ea6cddcf5cc5e6 SHA-256: 7e024382a7f19b32a84ddf728210e1143bdda5200413542c5950366f7f9541ff
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'https://ttraff.com/wix?keyword=captivate+for+ig+apkpure'. Another critical heuristic identified this as a PDF link farm, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier strongly supports the malicious nature of this PDF.

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.com/wix?keyword=captivate+for+ig+apkpure
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/14066687283.pdf
    • https://cdn.shopify.com/s/files/1/0428/1021/2519/files/rodotudoserubez.pdf
    • https://cdn.shopify.com/s/files/1/0437/8938/5888/files/rekovezezupenepezu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8992/9116/files/bodybuilder_workout.pdf
    • https://static.usrfiles.com/ugd/850f07_13bfad94caff44e78a0a38e4350a0e92.pdf
    • https://static.usrfiles.com/ugd/dd4472_277386c7d85448e4a91a99d5b169ae01.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e2aacc39c9b4d2cb4a4ad025b9efbc1.pdf
    • https://static.usrfiles.com/ugd/c7ef1a_4f7ea0bdefbd47f5a4779316db98df97.pdf
    • https://static.usrfiles.com/ugd/d2cc1f_b04115a9603346079a1227ebc9ef1aeb.pdf
    • https://static.usrfiles.com/ugd/e745be_fffe74170ed74644a056be3d341eed94.pdf
    • https://static.usrfiles.com/ugd/b8c837_59ea315c6e2249a7b59a97cd758be3dc.pdf
    • https://static.usrfiles.com/ugd/221f3a_3c1391c9c27a4f398c862550f6309ce8.pdf
    • https://static.usrfiles.com/ugd/99965f_1b9875b5b306476fa000d47637ba1b24.pdf
    • https://static.usrfiles.com/ugd/b8c837_b1054495f0e94cb0a6339e3c4811fb71.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d03.bin
7603ebd7f951241d98fca3cb234a5340f549683cd84cb3774cd18cfa69842f32
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D03 4888 bytes
font_01_sfnt_off00005dc9.bin
269c80088789da2c79702fce89ddf082bee0d0fd8a17cef901f16e6c835ecce9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC9 10348 bytes