Malicious PDF — malware analysis report

Static analysis result for SHA-256 31af5e92720b8957…

MALICIOUS

PDF

44.9 KB Created: 2020-08-11 04:01:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6867546feb7a4c7567a5abd975c456d3 SHA-1: 15cd5618401c2ac41c72f7a605a2a6a085f892a6 SHA-256: 31af5e92720b895744a21e1fbe4251aae2f5644eb09d7215436b9d837790950d
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain, ttraff.com. This suggests a link farm or SEO poisoning tactic to lure users into downloading malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted from this sample.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=assignment+front+page+pdf+nios
    • http://rinugepa.margaretshiver.com/uploads/1/3/1/4/131453150/5530554.pdf
    • http://files.emsgib.com/uploads/1/3/0/8/130814402/xijebesivujadas_mirulajimil_fomuregogu_bifoxinodesux.pdf
    • http://files.sarahfranconyc.com/uploads/1/3/2/7/132740598/dixagorulide.pdf
    • http://files.americanonesie.com/uploads/1/3/1/4/131484328/nasuzuk-waduked.pdf
    • https://cdn.shopify.com/s/files/1/0432/6175/5560/files/nofaxevivipatufipasap.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6241/files/criminal_law_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4154/files/pexonuvuzoma.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/ba_2nd_year_books_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/8614/2876/files/55939646817.pdf
    • https://cdn.shopify.com/s/files/1/0430/9290/2039/files/automatic_control_system_by_hasan_saeed.pdf
    • https://cdn.shopify.com/s/files/1/0433/7369/1045/files/2013_hyundai_elantra_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/2784/0669/files/98006799231.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/9038244122.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67257536452.pdf
    • https://cdn.shopify.com/s/files/1/0431/8075/3058/files/5341357801.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/98697495037.pdf
    • https://cdn.shopify.com/s/files/1/0428/8489/0790/files/fajoli.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_off000063c4.bin
8278cd55368e6c4ef5c311846c5303d8ebf0603a2ba6f8752c87a29d173f70db
pdf-font-stream PDF embedded font (sfnt) at offset 0x63C4 5108 bytes
font_01_sfnt_off000074fe.bin
385d5fe6a594bca1443ea120a0b2e066c28b33fcfdc0179f08586a879fd412c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x74FE 10416 bytes
font_02_sfnt_off000098b8.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x98B8 4324 bytes