Malicious PDF — malware analysis report

Static analysis result for SHA-256 804b20a659ca1059…

MALICIOUS

PDF

42.0 KB Created: 2020-08-08 04:57:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3704b22be8c8fa3d163ae489eb2bec1 SHA-1: 3c489ed8d69904dc9fba89b47c1c04b0f1431e4f SHA-256: 804b20a659ca1059949b649168760a9dec5c9ca2bac99eb2ecee118bb6ee9120
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though partially corrupted, includes text related to fitness and diet plans, suggesting a lure to disguise the malicious intent. The primary malicious URL is https://ttraff.com/pify?keyword=lose+fat+gain+muscle+diet+plan+pdf, which likely leads to further malicious content.

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=lose+fat+gain+muscle+diet+plan+pdf
    • http://files.moderndayseer.com/uploads/1/3/0/9/130969546/bulugale.pdf
    • http://files.otiesummerschool.com/uploads/1/3/0/8/130874143/vofimezamonabot_rojifex.pdf
    • http://fujime.spudflower.ca/uploads/1/3/1/6/131606490/58db6f8086.pdf
    • https://cdn.shopify.com/s/files/1/0430/8339/9321/files/67603191987.pdf
    • https://cdn.shopify.com/s/files/1/0430/7461/7511/files/rotinegopopanarema.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/78294040282.pdf
    • https://cdn.shopify.com/s/files/1/0433/4131/6249/files/1320384818.pdf
    • https://cdn.shopify.com/s/files/1/0439/5833/7694/files/avenida_brasil_curso_bsico_de_portugus_para_estrangeiros.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/munezimawawo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6730/files/assessment_of_learning_2_book.pdf
    • https://cdn.shopify.com/s/files/1/0440/9124/4696/files/83795705282.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/domokasijekodokafikuw.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/7997156753.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/beroromeligukonejukur.pdf
    • https://cdn.shopify.com/s/files/1/0431/0905/6666/files/71659596577.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_off0000669a.bin
52b92653b3e7f2f5f4825471ffc93ca10a29313f96e7ff1cb6c96ea3abd3f8e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x669A 5320 bytes
font_01_sfnt_off000078af.bin
627db4ae0b0dd959da5566b0f5ac44b49a572019de4fd0915e444d7144c69f8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x78AF 10196 bytes