Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba8e56385d602a86…

MALICIOUS

PDF

42.8 KB Created: 2020-08-09 06:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33c1573a7a7c382beb426ce43a09d85b SHA-1: c2ccad6a5b80a721c09b3e917047c1187a6a9c77 SHA-256: ba8e56385d602a8649a6f2910477cfe5747b4fcd0ad82a146fcc7b544e9a46a5
152 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 pointing to Shopify domains, which is characteristic of a link farm. One of the primary links, https://ttraff.com/pify?keyword=cardiogenic+shock+pdf, is identified as a malicious redirector. This suggests the document's purpose is to lure users through a chain of redirects to a malicious destination. No scripts were extracted from this sample.

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/pify?keyword=cardiogenic+shock+pdf
    • http://files.simplicityclothing2.com/uploads/1/3/0/7/130776757/mawab.pdf
    • http://files.realisticwingtutorial.com/uploads/1/3/1/6/131607440/3a5dc4efa5.pdf
    • http://files.sierrashakes.com/uploads/1/3/1/1/131163634/zajaw.pdf
    • http://karedupo.broadwaysilkens.com/uploads/1/3/0/8/130874633/pebepakokemuvu_voviwum_zajus.pdf
    • https://cdn.shopify.com/s/files/1/0436/0188/7396/files/kenikosamu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/livonakefevanu.pdf
    • https://cdn.shopify.com/s/files/1/0438/5341/4565/files/24519631572.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9461/files/96343711843.pdf
    • https://cdn.shopify.com/s/files/1/0431/1813/3405/files/autobuses_jimenez_horarios.pdf
    • https://cdn.shopify.com/s/files/1/0435/2330/9727/files/farefebobon.pdf
    • https://cdn.shopify.com/s/files/1/0433/2702/9400/files/rijoxudovaraxog.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/duzibuwusupamodugibeboz.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0209/files/apically_repositioned_flap.pdf
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/16966340870.pdf
    • https://cdn.shopify.com/s/files/1/0427/5663/6828/files/7038252256.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/gajoletudereroko.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_off00006906.bin
9e2a84a7c5f4915090a6ddfa4ef7702208cce63865182f66767994f20db56c52
pdf-font-stream PDF embedded font (sfnt) at offset 0x6906 5352 bytes
font_01_sfnt_off00007b39.bin
bea13129a3d2799f50f8d75e37685ea75807ba770b53cce9b3bb8e3339138d2d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B39 10268 bytes