Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a6ece91cfc3ce47…

MALICIOUS

PDF

43.3 KB Created: 2020-07-30 10:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3d2c9d977cca16b2ef03bff9cec409f SHA-1: 43b1843bd06fc8a254824d6086b4ed6aaef431be SHA-256: 5a6ece91cfc3ce47e60d76d0ac1cf45f61ee7abf8adb07b153bcd6e726e7a40a
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is disguised as a search result for a technical manual. The ML classifier strongly indicates maliciousness. While no scripts were extracted, the presence of a malicious link suggests an attempt to redirect the user to a compromised site or phishing page.

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=prodigy+p2+brake+controller+manual+pdf
    • http://files.empowerdancewellness.ca/uploads/1/3/0/8/130874205/lurofuwujelojotasar.pdf
    • http://files.vaultman.me/uploads/1/3/0/7/130775870/folatonavadiri.pdf
    • http://files.silbertnation.com/uploads/1/3/1/3/131384777/sebabi-sitijabaku-lavira-nifaginutejika.pdf
    • http://files.melinagac.com/uploads/1/3/0/9/130969742/80222f7da.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0583/6438/files/42727216590.pdf
    • https://cdn.shopify.com/s/files/1/0437/7932/6110/files/11212911617.pdf
    • https://cdn.shopify.com/s/files/1/0429/2712/8735/files/fenijepepod.pdf
    • https://cdn.shopify.com/s/files/1/0429/8365/3527/files/61818519735.pdf
    • https://cdn.shopify.com/s/files/1/0428/4288/2215/files/92091237401.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/58538898098.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/vunajirutoxizafukatatas.pdf
    • https://cdn.shopify.com/s/files/1/0428/0814/8127/files/25453131045.pdf
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/jogekajeleda.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4741/files/jedomibozudatowerizakom.pdf
    • https://cdn.shopify.com/s/files/1/0434/8405/3669/files/puzegatowutaruzirave.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000557c.bin
0c354a4a49b2a234647f7a5157c92f99969135c38289ff3a73bc1901a52e86e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x557C 5620 bytes
font_01_sfnt_off0000688b.bin
00018c585a406eb5667103a45ea0e6882505acb65def36c79d291a6d23668263		 pdf-font-stream PDF embedded font (sfnt) at offset 0x688B 9800 bytes
font_02_sfnt_off00008a4c.bin
448d4889d9c8a8868909895d84d98a1151e45ddedf2a76be64b22aa33b1d31ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A4C 16192 bytes

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