Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8b12581283d327e…

MALICIOUS

PDF

37.2 KB Created: 2020-07-25 23:34:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7200dfd6e30fe1baea189d7dc56649a1 SHA-1: 31462de6a459aa36e7d002431a92964d1739180b SHA-256: b8b12581283d327eb2588a2af487cee64d72ff2aabd109d41cb2cb4a41631adf
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of embedded links, suggesting a link farm or phishing attempt. The presence of a 'download button' heuristic further supports the lure of clicking a link. The primary malicious URL identified is ttraff.ru, which redirects to content related to 'cat dissection muscles guide'. The document body is heavily obfuscated and appears to contain metadata rather than user-readable content.

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.ru/pify?keyword=cat+dissection+muscles+guide
    • http://files.seeshorephoto.com/uploads/1/3/0/8/130874250/benelubik-fevafixok-dazaxebelovonum.pdf
    • http://files.independencedayanimalrescue.com/uploads/1/3/0/7/130740210/e1fe4b3.pdf
    • http://files.sheiladavis.ca/uploads/1/3/0/7/130776481/c9e448.pdf
    • http://files.victoriajsmith.com/uploads/1/3/1/6/131606016/woduxe_rugadujeg_zabugujariroka.pdf
    • http://files.victoriajsmith.com/up
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pisanebemewamabojesodid.pdf
    • https://cdn.shopify.com/s/files/1/0437/9167/9639/files/gosobamasofavexuxejumike.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gidawibozifuniji.pdf
    • https://cdn.shopify.com/s/files/1/0433/3551/6318/files/39025673194.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/viloronijiletamuzolodoxe.pdf
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/fovunufutaberojajub.pdf
    • https://cdn.shopify.com/s/files/1/0432/4976/2459/files/9182171929.pdf
    • https://cdn.shopify.com/s/files/1/0434/1353/6925/files/35766243383.pdf
    • https://cdn.shopify.com/s/files/1/0429/0537/0787/files/21594174461.pdf
    • https://cdn.shopify.com/s/files/1/0429/8525/9159/files/30227859377.pdf
    • https://cdn.shopify.com/s/files/1/0430/0413/3525/files/lasedejuguxib.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_off00005706.bin
ae733f6583e124dc62b1dbf3b52d5fd1d78338e88ae6df42d9189c6f98842978
pdf-font-stream PDF embedded font (sfnt) at offset 0x5706 5068 bytes
font_01_sfnt_off0000682a.bin
36270b2f51d2bcb4881ada2d6f11957309b04cf3997980cfa28427a80c925252
pdf-font-stream PDF embedded font (sfnt) at offset 0x682A 9300 bytes