Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b6fb0c72b03e56d…

MALICIOUS

PDF

42.6 KB Created: 2020-09-17 09:15:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 483d11112ca6adaec3a1fa93fda3d7e2 SHA-1: 26b5247238f1e8a99c40f64b86ac90ae13ff850c SHA-256: 2b6fb0c72b03e56d9ddbe1b4ab36f34df80fb3e467d0bed44516009db7692e6f
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a redirector URL that includes a keyword for a software serial keygen. This suggests a social engineering tactic to trick users into clicking the link. The presence of a 'Download Button' heuristic further supports this lure. The PDF also exhibits characteristics of a link farm, with numerous external PDF links, many of which are structured in a way that could be used for SEO manipulation to attract traffic. 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.club/wix?keyword=macx+dvd+ripper+pro+serial+keygen
    • http://files.strandberg-marine.com/uploads/1/3/2/6/132696104/jofesibe.pdf
    • http://fuvax.gloverfamilymedicine.com/uploads/1/3/2/8/132816202/7235576.pdf
    • http://rojibaz.danielklittleton.com/uploads/1/3/1/4/131437502/0f411a.pdf
    • https://cdn.shopify.com/s/files/1/0432/8577/4502/files/43877473749.pdf
    • https://cdn.shopify.com/s/files/1/0428/3862/2375/files/led_tv_repair_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/3944/0543/files/chaussures_plateforme_femme_gothique.pdf
    • https://cdn.shopify.com/s/files/1/0430/8877/3269/files/medivopewukokibij.pdf
    • https://cdn.shopify.com/s/files/1/0428/5959/3894/files/comment_assembler_plusieurs_dans_un_seul.pdf
    • https://cdn.shopify.com/s/files/1/0460/6001/1675/files/beauty_camera_now.pdf
    • https://cdn.shopify.com/s/files/1/0432/2374/4674/files/electric_guitar_beginners_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/3459/8809/files/multiplication_worksheets_printable_grade_4.pdf
    • https://cdn.shopify.com/s/files/1/0427/9985/7823/files/boronudepiremanawigim.pdf
    • https://cdn.shopify.com/s/files/1/0430/8022/0823/files/zenajutejeja.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/test_1879eb6a-339e-4d45-a409-571cd94a4742.pdf?v=1594212285
    • 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_off00006522.bin
07af47f03ef82596a09df3565549ee9909fbbbd391f2b204eac63e522422fa65
pdf-font-stream PDF embedded font (sfnt) at offset 0x6522 5540 bytes
font_01_sfnt_off00007830.bin
dcccfdda1787b1035811cb9000af4dd5da55a23753900c3be4420bb6b94dbd60
pdf-font-stream PDF embedded font (sfnt) at offset 0x7830 10988 bytes