Malicious PDF — malware analysis report

Static analysis result for SHA-256 a30640b729c0c1b9…

MALICIOUS

PDF

45.0 KB Created: 2020-08-25 13:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f622f774218e43df1564039aadab7a9f SHA-1: 980434ccf1b0cef658580df5a8b9695f7b37bad3 SHA-256: a30640b729c0c1b9487bb449f22174860ac05e5d5546f64f1da0064d64e7679e
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to other PDF files, a technique often used for SEO manipulation or to obscure malicious activity. One of these links redirects to 'ttraff.com', which is flagged as a malicious redirector. The document body contains garbled text but also includes the same malicious URL, suggesting an attempt to lure users to a potentially harmful site. No scripts were extracted, but the presence of a malicious redirector and a link farm points to a phishing or scam campaign.

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=pokemon+let%2527+s+go+pikachu+game+apkpure
    • http://files.infraredheadart.com/uploads/1/3/2/8/132815924/56debac.pdf
    • https://cdn.shopify.com/s/files/1/0434/0717/9941/files/73178774662.pdf
    • https://cdn.shopify.com/s/files/1/0431/7442/8829/files/43933726603.pdf
    • https://cdn.shopify.com/s/files/1/0428/9570/4227/files/33764963768.pdf
    • https://cdn.shopify.com/s/files/1/0430/4571/6129/files/54701376534.pdf
    • https://cdn.shopify.com/s/files/1/0431/3353/4369/files/wcw_devvon_terrell_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0429/1146/5638/files/boogie_woogie_piano_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/0380/5847/files/51535268053.pdf
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/jibimawapebet.pdf
    • https://cdn.shopify.com/s/files/1/0454/3532/2526/files/togefuzazulonujutuzetuneb.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_off00007189.bin
15cf4e4683db92d4832af4d7b70754a00f37931ea729d89779748cde2491badf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7189 5444 bytes
font_01_sfnt_off000083ea.bin
2fe3d870e8abccdde245b5928b41ea8f37663cba245cde22e89accbbb928e771		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83EA 10332 bytes

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