Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ee2cf3f8c9f2b5b…

MALICIOUS

PDF

35.7 KB Created: 2020-08-11 19:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee9a5671dfc19f1231a611378e34cb0c SHA-1: 2005dc9b7807279659cf460024ad087c1561a8e9 SHA-256: 9ee2cf3f8c9f2b5b2973d2ccf7eede82a3db827deb5876ac327a4d656788ec26
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, many of which are hosted on Shopify but ultimately redirect through a malicious domain, ttraff.ru. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirect. This indicates a phishing or redirection attack aiming to lead the user to harmful content.

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.ru/pify?keyword=2020+buell+1125r+service+manual+pdf
    • http://files.rainbowportal.website/uploads/1/3/1/3/131380005/8784364.pdf
    • http://files.drbrewer.net/uploads/1/3/1/4/131406049/950138.pdf
    • http://files.ukirkolemiss.org/uploads/1/3/1/4/131438190/vuwekevuneduwuxow.pdf
    • http://nonax.inspirationsgifts.net/uploads/1/3/2/6/132681488/3171962.pdf
    • https://cdn.shopify.com/s/files/1/0431/8927/2725/files/jolewevememigopimej.pdf
    • https://cdn.shopify.com/s/files/1/0436/0667/1517/files/26859945495.pdf
    • https://cdn.shopify.com/s/files/1/0431/8766/7104/files/94290837755.pdf
    • https://cdn.shopify.com/s/files/1/0437/1097/2056/files/76201414615.pdf
    • https://cdn.shopify.com/s/files/1/0431/7996/6628/files/centos_install_pip3.pdf
    • https://cdn.shopify.com/s/files/1/0434/2880/6807/files/marvel_universe_comics.pdf
    • https://cdn.shopify.com/s/files/1/0431/9189/4176/files/5718572871.pdf
    • https://cdn.shopify.com/s/files/1/0430/1085/0979/files/sprinkler_irrigation_system_design_calculations.pdf
    • https://cdn.shopify.com/s/files/1/0434/7848/3096/files/37793014044.pdf
    • https://cdn.shopify.com/s/files/1/0438/3889/8333/files/school_annual_day_anchoring_script.pdf
    • https://cdn.shopify.com/s/files/1/0437/6467/8807/files/fofojuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/jumbled_up_sentences_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/8886/1602/files/95601416520.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_off00004a45.bin
de07be82c69cb6a9fa68a4860c954dda52707e35e2ef2112c11b9e635f0c0fdf
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A45 5856 bytes
font_01_sfnt_off00005e14.bin
fa4dc722c21840c008013c9851f3f96535797bea882f6a0d684dabec0912450d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E14 10636 bytes