Malicious PDF — malware analysis report

Static analysis result for SHA-256 c45c9293c371934c…

MALICIOUS

PDF

41.2 KB Created: 2020-08-10 00:39:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c607a39dfbd8c447c14188d9aa3fe0ac SHA-1: f6e54381095213a1dbd19c1bd256acb976c5c11d SHA-256: c45c9293c371934c04ca2cbcef8fd0fdd9671b96ac4fa034e116655d7c7178d8
152 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. Additionally, it contains a large number of embedded links to other PDFs hosted on Shopify, indicating a link farm or redirection strategy. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack pattern involves leveraging external links for malicious purposes.

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=management+accounting+nature+and+scope+pdf
    • http://files.amprx.net/uploads/1/3/0/7/130738622/7a1b84dcb.pdf
    • http://files.vapeboss.shop/uploads/1/3/0/8/130814078/559e8ddf5.pdf
    • http://midogak.larkhallbowlingclub.com/uploads/1/3/0/7/130738799/totolunukosikagi.pdf
    • https://cdn.shopif
    • https://cdn.shopify.com/s/files/1/0431/8131/0114/files/pabelezalerinerizapuluv.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/kavavosofenetefaxofapo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6158/3776/files/applied_nursing_research.pdf
    • https://cdn.shopify.com/s/files/1/0433/9476/0862/files/kosuwafeloteja.pdf
    • https://cdn.shopify.com/s/files/1/0431/0476/4068/files/xiwokafaxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7346/0631/files/chander_pahar_story_in_bengali_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/gafojiwidojoxasub.pdf
    • https://cdn.shopify.com/s/files/1/0433/0435/3956/files/basketball_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0435/8524/1245/files/koxiv.pdf
    • https://cdn.shopify.com/s/files/1/0436/1004/6621/files/zsh_for_windows.pdf
    • https://cdn.shopify.com/s/files/1/0432/9550/6592/files/rozixerudoba.pdf
    • https://cdn.shopify.com/s/files/1/0430/1144/0803/files/beguba.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_off00006871.bin
384d55517c277bc07affd07a3e29406d3ab2f8d31ebdefd8ee43bf2eb0ce352a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6871 5448 bytes
font_01_sfnt_off00007af5.bin
b7978b9854634d72f825fffc969d284cb81505dbe08ead0ea2405d4db963f0b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF5 8372 bytes