Malicious PDF — malware analysis report

Static analysis result for SHA-256 e61bd51eb4282d38…

MALICIOUS

PDF

44.2 KB Created: 2020-08-22 20:46:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f3a9b7dfd6bf842fbe7569ff8fbd10a SHA-1: 4aebf5d7d3caac84986ed20cc1dd5f9c0214d37d SHA-256: e61bd51eb4282d385229f652b4c9e291a42b232d924cbf70eb05cf291139b950
152 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The embedded links, particularly the one pointing to 'ttraff.ru', suggest a phishing or malware distribution attempt. No scripts were extracted, but the sheer volume of links points to a broad-based lure.

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=que+es+personal+branding+pdf
    • http://files.debbylovell.com/uploads/1/3/0/7/130775588/6313908.pdf
    • http://files.lucysartistcottage.com/uploads/1/3/0/7/130775728/953234.pdf
    • http://files.daleresourcegroup.com/uploads/1/3/1/8/131856072/8846645.pdf
    • https://cdn.shopify.com/s/files/1/0437/5465/1799/files/jukinikozowuwabojoguwib.pdf
    • https://cdn.shopify.com/s/files/1/0430/5649/6794/files/17787133841.pdf
    • https://cdn.shopify.com/s/files/1/0438/4168/3618/files/jodozalomoxobozujopus.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/5066897743.pdf
    • https://cdn.shopify.com/s/files/1/0433/0625/4504/files/73482980275.pdf
    • https://cdn.shopify.com/s/files/1/0435/6292/6229/files/biological_science.pdf
    • https://cdn.shopify.com/s/files/1/0431/6512/2720/files/58941417491.pdf
    • https://cdn.shopify.com/s/files/1/0443/1986/7036/files/buffalo_nas_navigator_2_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0435/7275/6648/files/math_logic_problems.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_off00006e15.bin
af7a3eab9ce1280523439a06f8e5b6da40ce580676990dbf07a4c85b3301e577
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E15 5408 bytes
font_01_sfnt_off00008088.bin
069c674caa80ede90a5d027e903d3d798755a0b455cb9d85b53b6fc5770f6b9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8088 10404 bytes