Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ae0a9ff718bfff…

MALICIOUS

PDF

40.4 KB Created: 2020-08-18 13:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a840f3c02915be6a19c71c3b2c29d9ba SHA-1: e6d2771b54c99bd5e6206bc64c2b691443789684 SHA-256: 65ae0a9ff718bfffce6026ca8fb3e93a0f9c7b2e8b6a7c861c659da547f15a67
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.ru/pify?keyword=sociological+approach+literary+criticism+pdf`. This indicates the document's primary purpose is to redirect users to potentially harmful content, likely for phishing or malware distribution.

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=sociological+approach+literary+criticism+pdf
    • http://zapoboz.kevinogrady.com/uploads/1/3/0/7/130738720/2545931.pdf
    • http://files.dartendistrict.com/uploads/1/3/1/8/131856381/jarukid.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/24248109623.pdf
    • https://cdn.shopify.com/s/files/1/0434/4188/1254/files/jufazo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0775/3888/files/system_analysis_and_design_tutorial_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5382/5704/files/89950573283.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2335/files/degusunutape.pdf
    • https://cdn.shopify.com/s/files/1/0429/5704/5913/files/towa_no_kizuna.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87932640634.pdf
    • https://cdn.shopify.com/s/files/1/0438/8444/5864/files/12555053349.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pazobezosajage.pdf
    • https://cdn.shopify.com/s/files/1/0434/5934/6582/files/89896268286.pdf
    • https://cdn.shopify.com/s/files/1/0459/2258/2679/files/sibivo.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_off00005fa2.bin
6b971f2f2dd4dc5f4cf93d28690f5059877c5c02d893001f2f2b3e7d45a27e70
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA2 5776 bytes
font_01_sfnt_off0000731e.bin
a05825ebf6a1e7746e517f19b857b10f383a9b344bc8eb3278d2ccf922540a7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x731E 9952 bytes