Malicious PDF — malware analysis report

Static analysis result for SHA-256 26ee12c769e4993e…

MALICIOUS

PDF

41.6 KB Created: 2020-08-03 16:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2dc02c6cd651757939cde1e907829a40 SHA-1: d14405d95fb304b1474f82374adcc8dad79e2920 SHA-256: 26ee12c769e4993ea77d4e6b67e92ec7f69faccd5a48094bac1c457adbc3667b
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a book title. This indicates a phishing or scam attempt. The PDF also contains a large number of links to other PDFs hosted on Shopify, likely an attempt to appear legitimate or for SEO manipulation. No scripts were extracted, but the primary malicious behavior is the redirection to a harmful URL.

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=a+random+walk+down+wall+street+author+burton+malkiel+pdf
    • http://files.aysenurguler.com/uploads/1/3/1/3/131398099/zirurajivatifos.pdf
    • http://files.melaninmasks.net/uploads/1/3/0/7/130775912/wezixukuzumudokobib.pdf
    • http://files.mipostcards.com/uploads/1/3/2/6/132681985/bf2bd2.pdf
    • http://files.ferrisstudios2.com/uploads/1/3/1/8/131857540/3614790.pdf
    • http://files.marsjoyofpainting.com/uploads/1/3/1/6/131606127/1986964.pdf
    • https://cdn.shopify.com/s/files/1/0428/3678/7356/files/wilton_drill_presses.pdf
    • https://cdn.shopify.com/s/files/1/0437/0723/6503/files/2004_ford_explorer_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/58679073371.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6429/files/best_minecraft_hunger_games_server.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9030/files/triangle_bounding_sphere.pdf
    • https://cdn.shopify.com/s/files/1/0435/7645/9422/files/gomasowugimadomesum.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/38757835399.pdf
    • https://cdn.shopify.com/s/files/1/0434/0563/9836/files/20508724673.pdf
    • https://cdn.shopify.com/s/files/1/0437/6828/3294/files/63989910265.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0610/files/xawadune.pdf
    • https://cdn.shopify.com/s/files/1/0437/1503/5288/files/79305004625.pdf
    • https://cdn.shopify.com/s/files/1/0431/2160/6817/files/52239448261.pdf
    • https://cdn.shopify.com/s/files/1/0441/0081/2952/files/19068621674.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_off00006508.bin
bafda65f8e4e424825549ba58b1ba49a564f162a909a33c3f21177d99634b2c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6508 5568 bytes
font_01_sfnt_off000077ce.bin
939c32f5dac8287fdcce30935ef4b5c0da53a751b6e9bf50300c5f84e4243357		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77CE 9772 bytes

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