Malicious PDF — malware analysis report

Static analysis result for SHA-256 09e4da893084c389…

MALICIOUS

PDF

44.0 KB Created: 2020-08-11 20:41:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1c47022a0137fc3c578c85ac1cb3e40 SHA-1: 5bfcff74d37e6708b45e3b55020133da72699861 SHA-256: 09e4da893084c3894631490a1227a0b0be09dbd298f4876f10c75d95360de3b4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large collection of external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier strongly supports the malicious nature of this document.

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=national+iodine+deficiency+disorders+control+programme+pdf
    • http://files.higgsfuneralhomeandflorist.com/uploads/1/3/0/7/130776645/995379.pdf
    • http://files.numanagement.net/uploads/1/3/0/7/130739328/romopoxur-niberexapuwalu-sejukulif.pdf
    • http://files.jaggedglass.com/uploads/1/3/1/8/131856333/25ad1640.pdf
    • http://files.medaryville.net/uploads/1/3/1/1/131164442/5d33b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0667/2546/files/59158130781.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kuvesagapixunijibofalase.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78549170372.pdf
    • https://cdn.shopify.com/s/files/1/0448/5254/3649/files/apex_programming_language.pdf
    • https://cdn.shopify.com/s/files/1/0432/4222/5832/files/95685087994.pdf
    • https://cdn.shopify.com/s/files/1/0437/3794/0133/files/xajavexejunelenogakulof.pdf
    • https://cdn.shopify.com/s/files/1/0430/0197/0837/files/heber_az_weather.pdf
    • https://cdn.shopify.com/s/files/1/0430/6878/4791/files/diploma_applied_science_book.pdf
    • https://cdn.shopify.com/s/files/1/0439/2163/7544/files/joxujelurilex.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/48396570261.pdf
    • https://cdn.shopify.com/s/files/1/0429/9961/1553/files/vofidikenep.pdf
    • https://cdn.shopify.com/s/files/1/0430/8847/8365/files/badowalebifusejiwawax.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_off00006c5f.bin
92ce76e6d33067ff9582d617b8b3fae63b0c5e65941b888b15f7ed939ece4898
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5F 5544 bytes
font_01_sfnt_off00007f31.bin
e2906e3c70a39ecb3aa20efbe4f27aa03bbe8918bf6ccacaae6e0908026f6240
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F31 10336 bytes