Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ff7af1aab4a0084…

MALICIOUS

PDF

48.9 KB Created: 2020-08-17 15:44:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6a8e822b62a353f5f4fc9f0e10146259 SHA-1: cef0f0ccad51615b2d98d1eda096a599ff19c77f SHA-256: 8ff7af1aab4a00845504d08b026b2f523f6bf9cb0ce7b8e7f2d49442a6830be1
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The ML classifier also flagged this PDF as malicious. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm or phishing attempt, aiming to direct users to malicious sites.

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=angular+reactive+form+input+type+file In PDF document text
    • http://viren.windowwarehousedraperysupply.com/uploads/1/3/1/4/131437812/seretos.pdfIn PDF document text
    • http://files.axaofalps.com/uploads/1/3/0/8/130813511/kutej-fiwewujaroj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6939/1527/files/musufebawaxojij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2640/7833/files/jigeratimexajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8418/4728/files/degowirapor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2982/1600/files/43137884581.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/69387043742.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8492/3555/files/bonurolobeset.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gefoviliruvowej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0386/2440/files/luwopakulakigo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8199/0304/files/25142477533.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/generation_zero_trainer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/kibavevisulebifomapejode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6631/8230/files/kegoxonetaja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86562581376.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6881 5308 bytes
SHA-256: 3d4abb562eee6d2db6ac43b42f819028b254122700dac3486bd436a955b48373
font_01_sfnt_off00007a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A87 2140 bytes
SHA-256: 3eadf3ff1ae85f7a2dd8be852d633ca148c1d24200a16cbd4325889adc5789c4
font_02_sfnt_off00008461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8461 15580 bytes
SHA-256: 91570f4014004b397d4e6057f65c34ea19a84ddd41637cd56d51a669a47462bc

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