Malicious PDF — malware analysis report

Static analysis result for SHA-256 6903b869feb6bfe4…

MALICIOUS

PDF

34.2 KB Created: 2020-08-09 17:07:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfbf08958f95164c75b666bf14847ac6 SHA-1: e160f78fbb34a98a9423ef0c65f5b8c0d4c2bfd0 SHA-256: 6903b869feb6bfe428e8cadda262d49c830354170fb5e5500734bfb469b9d346
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link, https://ttraff.com/pify?keyword=bearing+pdf+file+download, which is designed to lead users to further malicious content. The document also hosts a large number of external PDF links, likely for SEO manipulation or to obscure the primary malicious destination. The ML classifier strongly indicated maliciousness, supporting the presence of these deceptive links.

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=bearing+pdf+file+download
    • http://files.ksexoticfragrances.com/uploads/1/3/1/4/131437724/28d1959af954c62.pdf
    • http://files.loveadelyn.com/uploads/1/3/1/3/131384604/1988225.pdf
    • http://files.lyricsandpoems-cacreed.com/uploads/1/3/0/8/130813821/6881740.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/6908/6619/files/winuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4170/9462/files/lukinadogas.pdf
    • https://cdn.shopify.com/s/files/1/0430/2484/2906/files/4166420223.pdf
    • https://cdn.shopify.com/s/files/1/0429/6871/1321/files/first_500_prime_numbers.pdf
    • https://cdn.shopify.com/s/files/1/0433/6402/4479/files/95724196142.pdf
    • https://cdn.shopify.com/s/files/1/0433/8771/5742/files/medakorukabitezi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1358/5566/files/wevula.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/pazov.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/diturubeli.pdf
    • https://cdn.shopify.com/s/files/1/0435/3638/4159/files/64822201768.pdf
    • https://cdn.shopify.com/s/files/1/0429/7628/0729/files/9824018512.pdf
    • https://cdn.shopify.com/s/files/1/0437/7939/1646/files/godfrey_higgins_anacalypsis.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_off000048d3.bin
b7764d1ec4c7af01df877008faa7ceb8514d80822ae85f224c9cea7f28be0ae4
pdf-font-stream PDF embedded font (sfnt) at offset 0x48D3 5172 bytes
font_01_sfnt_off00005a92.bin
20a663534475af0428323797adf120a7ffa8ce1a6ae39b808cadf3f7492a679f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A92 10016 bytes