Malicious PDF — malware analysis report

Static analysis result for SHA-256 8316266bd3e8ca81…

MALICIOUS

PDF

41.4 KB Created: 2020-09-10 03:43:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 396271183c37cb4f1a46f513cec58070 SHA-1: 2d597d3b190037fbaa162e15ade4f2eebdfefde7 SHA-256: 8316266bd3e8ca81e1dda6cc71ae163020de974ff07f8acd599f4d105d8c1e46
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to what appears to be a link farm designed for SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.link/wix?keyword=ouvrir+compte+gmail+android', which is likely used to deliver a malicious payload or phish for credentials. 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.link/wix?keyword=ouvrir+compte+gmail+android
    • http://kopoz.harbottleaudio.com/uploads/1/3/1/4/131453060/fobapikez_zevuvaf_riwoxukena.pdf
    • http://bujik.flynnscareerandcollegeready.com/uploads/1/3/1/3/131379070/0895a.pdf
    • http://files.ednacrosstimbers.com/uploads/1/3/0/7/130776386/vazaregitabonovuwuxi.pdf
    • http://files.michiganhorsecouncil.com/uploads/1/3/1/4/131483020/8ff5fc7.pdf
    • http://tadikoro.sheilatrecartin.com/uploads/1/3/1/4/131483281/zegopilawinam.pdf
    • http://basufi.bybliss.com/uploads/1/3/0/9/130969368/vekilagixibunuf-xexoruwe-fosogenasesoj.pdf
    • http://files.karmaroadwalkingthroughtime.com/uploads/1/3/1/8/131856146/62a3222f3.pdf
    • http://files.kretzmerconsulting.com/uploads/1/3/0/9/130969080/kezotuzatibe_jesewikepowibu.pdf
    • http://raxifame.fastmobileautoservice.com/uploads/1/3/0/7/130776208/kurikizupolenekamus.pdf
    • http://tunaluli.tulleshed.net/uploads/1/3/2/7/132710567/jutojofamezelax-kibaweduj.pdf
    • https://static.usrfiles.com/ugd/b8c837_f2b0b735e20c4f308f2f9922363ccce6.pdf
    • https://static.usrfiles.com/ugd/02beb7_74797761ae404510bd4910935f067fa1.pdf
    • https://static.usrfiles.com/ugd/2d797c_3f91d96e433345ffb0699484ccd25299.pdf
    • https://static.usrfiles.com/ugd/c79b1c_02ea44720d9a4c25a223ed59ed8a78f3.pdf
    • https://static.usrfiles.com/ugd/70c1f8_4eb1c14442034d8fa4c205a580305ca6.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/71558367326.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/myanmar_ebook_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/77363931764.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/56278712590.pdf
    • https://cdn.shopify.com/s/files/1/0437/9390/7869/files/40915165954.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_off00005ea1.bin
0dfbb223dc8fc2f1debb8eb27f6ef40e2bd721bf62c6f7bcc181bc5fd0705e5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA1 5300 bytes
font_01_sfnt_off00007097.bin
3d01feb5320631c0e239397a55a747f60b064d1f602e2ac2d3c99e8004a41a85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7097 11920 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.