Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2743ba047b86dcb…

MALICIOUS

PDF

47.2 KB Created: 2020-08-23 16:01:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3730d47294c0ce6f39a7065928f7c057 SHA-1: 85efcb10720ed72e63fd5bd6431e857b64016efd SHA-256: e2743ba047b86dcbeff8e3d2a1b801e4353044dadb6b2ea151d6487dfbff3e25
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded links to Shopify domains, some of which are confirmed benign but others are unknown. The primary malicious URL is likely used to redirect users to a phishing page or download further malware.

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=auto+transport+bill+of+lading+form+free
    • http://files.spelledlikethehockeyplayer.com/uploads/1/3/1/0/131069832/vujekukupapiwaduja.pdf
    • https://cdn.shopify.com/s/files/1/0429/8443/9971/files/23623137626.pdf
    • https://cdn.shopify.com/s/files/1/0435/0024/1061/files/shell_company_history.pdf
    • https://cdn.shopify.com/s/files/1/0437/2204/7638/files/split_merge_freeware.pdf
    • https://cdn.shopify.com/s/files/1/0436/2534/9273/files/kozugipubiboni.pdf
    • https://cdn.shopify.com/s/files/1/0440/4386/2181/files/toxulepujetumo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5061/4429/files/breast_cancer_research_articles.pdf
    • https://cdn.shopify.com/s/files/1/0437/3626/8949/files/pemifuge.pdf
    • https://cdn.shopify.com/s/files/1/0435/9897/1038/files/17909326455.pdf
    • https://cdn.shopify.com/s/files/1/0433/3935/0181/files/nufepowidepapu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4041/6678/files/base64_encode_js.pdf
    • https://cdn.shopify.com/s/files/1/0436/2089/2834/files/busonid_caps_bula.pdf
    • https://cdn.shopify.com/s/files/1/0440/5015/3622/files/darksiders_warmastered_edition_achievement_guide_and_roadmap.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e20.bin
9721837005d90e80472184f29eff9d8e791f627fd854adf79075853f30d0f436
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E20 5372 bytes
font_01_sfnt_off0000803f.bin
0d64e3612312259c82daeaadb86ac95407090b24e43eafc7ea9d917bf91439be
pdf-font-stream PDF embedded font (sfnt) at offset 0x803F 9704 bytes
font_02_sfnt_off0000a16c.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA16C 4324 bytes