Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c86c1eb8cdef283…

MALICIOUS

PDF

82.6 KB Created: 2020-08-01 17:05:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b70ad95c7036558453613ae65e1e03a SHA-1: b3e7c32f6a5d3f3c43d35e689985863f04135f73 SHA-256: 3c86c1eb8cdef2838dd9cec039be99d60d567079adfce7dff420216608d49a57
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.com/pify?keyword=...`. This indicates the document is designed to lure users to a potentially harmful website. The presence of a large number of external PDF links also suggests a link farm or SEO poisoning attempt, further supporting a malicious intent.

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=%25D1%2582%25D0%25B5%25D0%25BB%25D0%25B5%25D0%25BA%25D0%25BE%25D0%25BC%25D0%25BF%25D0%25B0%25D0%25BD%25D0%25B8%25D1%258F+%25D0%25BE%25D1%2580%25D0%25B1%25D0%25B8%25D1%2582%25D0%25B0+%25D0%25BA%25D1%2580%25D0%25B0%25D1%2581%25D0%25BD%25D0%25BE%25D0%25B0%25D1%2580%25D0%25BC%25D0%25B5%25D0%25B9%25D1%2581%25D0%25BA+%25D0%25BD%25D0%25BE%25D0%25B2%25D0%25BE%25D1%2581%25D1%2582%25D0%25B8
    • http://files.vidayvoluntariado.org/uploads/1/3/0/7/130740193/5209330.pdf
    • http://files.miniwanderers.co.uk/uploads/1/3/0/7/130776042/7990256.pdf
    • http://files.stefan-goetz.com/uploads/1/3/1/1/131163904/de3ab29b04.pdf
    • http://files.cc4cl.org/uploads/1/3/0/8/130814208/9615352.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vazakiliduvapi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/tezakaxoxepowakepufo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/test_1879eb6a-339e-4d45-a409-571cd94a4742.pdf?v=1594212285
    • https://cdn.shopify.com/s/files/1/0430/9018/2297/files/zavanezokulepelidi.pdf
    • https://cdn.shopify.com/s/files/1/0436/4537/0518/files/16881523835.pdf
    • https://cdn.shopify.com/s/files/1/0434/4299/5352/files/buvifibagisu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6001/6790/files/minecraft_attack_of_the_b-_team.pdf
    • https://cdn.shopify.com/s/files/1/0430/8185/9225/files/mokowexu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87294954422.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87745409623.pdf
    • https://cdn.shopify.com/s/files/1/0431/2642/3701/files/66397687332.pdf
    • https://cdn.shopify.com/s/files/1/0434/1586/3452/files/82295435728.pdf
    • https://cdn.shopify.com/s/files/1/0432/4248/7972/files/mozev.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_off0000f100.bin
c3636419df1a359658e88951dc05d7acc705c26009d87ba0e34b2e5898fd0c51		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF100 5820 bytes
font_01_sfnt_off00010448.bin
fa973da737164d9aa83f4b1095987448f0618b77782ff4139ef52daa7020bc5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10448 17868 bytes

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