Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ba87cfba2a74d4b…

MALICIOUS

PDF

46.9 KB Created: 2020-07-29 14:27:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cc58752b3359944d473e37e48e1f8df1 SHA-1: 62e54c8bf08c94505ead43428ff20bb4ed6667bc SHA-256: 6ba87cfba2a74d4bfed02905fb1bc519779708bc74cde71cb5ef248dfe42c485
154 Risk Score

Malware Insights

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

This PDF file contains numerous links to external resources, masquerading as a document about "stability of tuned amplifiers". One of the primary links directs to a known malicious redirector infrastructure, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful 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.ru/pify?keyword=stability+of+tuned+amplifiers+pdf In PDF document text
    • http://files.msjonline.com.au/uploads/1/3/0/7/130775776/tovilawixutexef.pdfIn PDF document text
    • http://files.orgorg.co/uploads/1/3/0/7/130774962/vodivojifeladutigor.pdfIn PDF document text
    • http://files.conservingcentralindia.org/uploads/1/3/2/6/132695492/pimisimumefex_notaw_sobajelunovoxa_kirovipenujapo.pdfIn PDF document text
    • http://files.myfavoriteoldies.com/uploads/1/3/1/4/131438018/mugudop.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/1/0428/7650/2175/files/54682543083.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0790/9781/files/nidovifili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5176/8225/files/luvenak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2684/9700/files/52717676784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7093/0600/files/ximar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7612/4821/files/doxidexowovimunilos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3206/7748/files/wiketu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1434/9215/files/23300922685.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7447/7473/files/vogetisowizemofazabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4980/3159/files/78195824822.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/buxigol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1586/2434/files/dunaredinovaberaxajutawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7526/2869/files/nikijosewixor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71895612735.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78AE 5412 bytes
SHA-256: b654e1f65a1fb9898eb5b40ba29eff4f7160b5b926646b69a96a3660a4dfa1e8
font_01_sfnt_off00008af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF4 10276 bytes
SHA-256: d847466bf07ff1c1dc574ec4effa5c5d2d11373c138f9e003b0834cbf248ffa8

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