Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa2bf400b13c2cd…

MALICIOUS

PDF

41.4 KB Created: 2020-08-12 10:02:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1aecfb100ca3be8b9079903b189c01ce SHA-1: 2977ef1f2cd1ad99eb122a09f0c0f5532eaf30e5 SHA-256: 2fa2bf400b13c2cd802be05146737f5be2024fe1e9de6f4154508d2d91833f43
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one critical heuristic identifying it as a PDF link farm. The primary URL, https://ttraff.ru/pify?keyword=alphabetical+series+reasoning+pdf, is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL and other Shopify links, suggesting a coordinated effort to drive traffic to malicious or spam-related content. 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=alphabetical+series+reasoning+pdf
    • http://files.thespareroombook.com/uploads/1/3/0/8/130814346/famivuvewunob_fozimuzutopevof.pdf
    • http://kuwedi.systemsafetyengineering.com/uploads/1/3/1/8/131856543/4365186.pdf
    • http://files.researchjunction.net/uploads/1/3/2/8/132814989/ecd9860a.pdf
    • http://bexefo.odbijelihandela.com/uploads/1/3/1/3/131383483/konisimuxolig.pdf
    • https://cdn.shopify.com/s/files/1/0431/5929/0022/files/bubedubivu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2925/8649/files/wezuliremawumifegegatafe.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/jidedukalutavo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1396/3929/files/78057695290.pdf
    • https://cdn.shopify.com/s/files/1/0440/7105/9608/files/zavusatoru.pdf
    • https://cdn.shopify.com/s/files/1/0430/5630/0186/files/67609847669.pdf
    • https://cdn.shopify.com/s/files/1/0428/2908/6876/files/public_participation_in_policy_making.pdf
    • https://cdn.shopify.com/s/files/1/0432/4383/1464/files/fazewuwin.pdf
    • https://cdn.shopify.com/s/files/1/0433/9531/7918/files/the_art_of_argumentation_and_debate.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61927850068.pdf
    • https://cdn.shopify.com/s/files/1/0438/2310/4160/files/maytag_quiet_series_100_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/9946/4611/files/muwuzuguxisozu.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_off00005cfd.bin
57563b77b04197c4ea1fefc123702a5b8cdac0fe96375bc8056b1836998d792e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CFD 5544 bytes
font_01_sfnt_off00006fbe.bin
5317c501a988071a41fb46c2746f3e4f63bd9d903e6ffeb68d82d6d4ef386d07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBE 12956 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.