Malicious PDF — malware analysis report

Static analysis result for SHA-256 f04192c192c6b4ad…

MALICIOUS

PDF

47.5 KB Created: 2020-08-15 10:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f15763f9a14417ed8806554add6041d SHA-1: 797f96c788a28080e35da75cb7ec498d403eeade SHA-256: f04192c192c6b4ad0e4ff22334163b49224d64f5f6396888785ec868118c1f11
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, characteristic of a link farm designed to manipulate search engine rankings or distribute malware. One of these links, https://ttraff.ru/pify?keyword=galaxy+s8+battery+drain+android+system, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this malicious URL and other PDF links, reinforcing the link farm and redirection attack pattern. No scripts were extracted, limiting further analysis of the payload.

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=galaxy+s8+battery+drain+android+system
    • http://files.healthsidekick.org/uploads/1/3/1/3/131383678/6225911.pdf
    • http://jeguxedi.kingfishercct.org/uploads/1/3/1/6/131637306/tidukuximewovu.pdf
    • http://xulim.meraglimholdings.com/uploads/1/3/2/3/132302782/wegodut-rozotonajoso.pdf
    • http://files.promolusitano.com/uploads/1/3/2/6/132680932/dupuvujowib-rovezebodinaw-fojoxogimav.pdf
    • http://fuduv.uamanchester.com/uploads/1/3/1/3/131379591/timuzenelom.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/92204617233.pdf
    • https://cdn.shopify.com/s/files/1/0434/5973/9814/files/autumn_leaves_improvisation_piano.pdf
    • https://cdn.shopify.com/s/files/1/0449/9554/3208/files/achtsamkeit_buch.pdf
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/guvoba.pdf
    • https://cdn.shopify.com/s/files/1/0430/7002/9975/files/banumabirigemetiwinivixij.pdf
    • https://cdn.shopify.com/s/files/1/0436/5592/1817/files/ludisusuzomuxizivonuzar.pdf
    • https://cdn.shopify.com/s/files/1/0429/4030/1478/files/gunevetimig.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/bodyweight_workout_chart.pdf
    • https://cdn.shopify.com/s/files/1/0434/0924/4316/files/83737389630.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d8a.bin
3b8fb425e923074e36a48fe409398c5a91ad2cd7db9a3552c147ed16d7f63766		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8A 5296 bytes
font_01_sfnt_off00007f70.bin
2370878d7de669acff63d284627166639369f56520a5dea0e812a8599b4d6d0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F70 10364 bytes
font_02_sfnt_off0000a2fa.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2FA 4324 bytes

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