Malicious PDF — malware analysis report

Static analysis result for SHA-256 87696f023d91a236…

MALICIOUS

PDF

32.5 KB Created: 2020-08-16 19:06:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2515e96e388ff15392702166d485528b SHA-1: 13141aa4b3eacfe239c4c91f5db6787278508974 SHA-256: 87696f023d91a236d0c3f45c178e711a218eaabee687bfd8f67a564b64ef895d
154 Risk Score

Malware Insights

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

The PDF file contains a high number of embedded links, many pointing to Shopify domains, but also includes a critical link to a known malicious redirector at ttraff.ru. The document body, though partially corrupted, contains the same deceptive title as the malicious URL, suggesting a lure for users to click on the links. The ML classifier also strongly indicated maliciousness.

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=dd+national+live+tv+channel+free
    • http://files.tarajartist.com/uploads/1/3/1/4/131453645/5dcae0580f724f.pdf
    • http://files.truthministryaz.org/uploads/1/3/1/8/131856257/3965985.pdf
    • http://files.puppiesbypenny.com/uploads/1/3/2/6/132681836/2669930.pdf
    • http://www.zengatv.com/embed?v/a1130c50-2fa0-11e1-8f87-
    • https://cdn.shopify.com/s/files/1/0431/8937/1029/files/96462393979.pdf
    • https://cdn.shopify.com/s/files/1/0435/3431/9776/files/33576653399.pdf
    • https://cdn.shopify.com/s/files/1/0431/7747/6260/files/gikugusewajemus.pdf
    • https://cdn.shopify.com/s/files/1/0428/0667/3575/files/nuzifofexupufusoviwomip.pdf
    • https://cdn.shopify.com/s/files/1/0436/5385/7433/files/5127497973.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7934/files/vamewifa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0642/6275/files/sasasosipite.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_off0000436f.bin
24bc06bb380e94e4f9dcc31fba76b59c99a59f51c4201f93031d93f65c3ba299		 pdf-font-stream PDF embedded font (sfnt) at offset 0x436F 4992 bytes
font_01_sfnt_off0000546c.bin
2f079a792876fe30594510a9a56b9835b063ced031afa0ddcb1e0acdd32cda6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x546C 9800 bytes

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