Malicious PDF — malware analysis report

Static analysis result for SHA-256 009dbd0f951cec96…

MALICIOUS

PDF

39.8 KB Created: 2020-08-19 14:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c430ccc8cc982df4e2fa6f5fb4e7ada SHA-1: ef8b1f51d85f68606da56d26199c4ef9c2aea2c3 SHA-256: 009dbd0f951cec967f5c154a56830dab3793e0a11a0b6ec7d6a0370ab162b177
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise the malicious link within a seemingly innocuous topic. The presence of a large number of external PDF links, many pointing to Shopify, further indicates a link farm or SEO poisoning tactic to distribute the malicious 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.com/pify?keyword=amazing+grace+hymn+piano+sheet+music
    • http://files.teamhawaiianchaos.com/uploads/1/3/0/7/130738614/c23ce0efbc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/0491/7917/files/ap_stylebook_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/3098/4357/files/again_piano_sheet_your_lie_in_april.pdf
    • https://cdn.shopify.com/s/files/1/0429/6281/3084/files/zabawumupifis.pdf
    • https://cdn.shopify.com/s/files/1/0432/1630/6344/files/sql_server_2020_management_studio_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0438/2697/0786/files/xalaxinemekaladu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1425/0905/files/bagife.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wozofedotomutigetipire.pdf
    • https://cdn.shopify.com/s/files/1/0450/2038/1342/files/xekor.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/36567314811.pdf
    • https://cdn.shopify.com/s/files/1/0439/2153/9240/files/alfred_adler_biography.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c7d.bin
0f253325362bd6d50735ba2a54b4a5f04dc13711067db9b4a134882799b98a97
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C7D 5456 bytes
font_01_sfnt_off00006ee4.bin
28ad8988b64b9cd62264a910f7e278b6129712ec15872bc530fef6bc33fa8795
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE4 10576 bytes