Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d04eb0a405e49b6…

MALICIOUS

PDF

48.1 KB Created: 2020-07-31 19:28:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f18ef5e27137f28779ec5a247768fb4d SHA-1: 8212256624b1398e652a639f0b9f4e28f8f0fef2 SHA-256: 3d04eb0a405e49b6bd4228701e389e01354eec523d0c6e0f3fdaba0d1c24528c
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=farmville+2+country+escape+cheats'. The document body, though heavily obfuscated, also contains this URL and other links to Shopify-hosted PDFs. This suggests the document is designed to drive traffic to malicious sites, likely for phishing or malware delivery.

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=farmville+2+country+escape+cheats
    • http://files.ams-florida.com/uploads/1/3/1/1/131163540/tijabatuze.pdf
    • http://files.alidonaldson.uk/uploads/1/3/0/8/130874587/gekojunerosidev_geradijawig_mefojun.pdf
    • http://files.kcorneliusimagesandmarketing.com/uploads/1/3/2/6/132681767/mudatirafilexe_jumeg.pdf
    • http://files.pca-music.com/uploads/1/3/0/7/130739234/wujulasujike-rexilixudofu-napejesovini.pdf
    • https://cdn.shopify.com/s/files/1/0430/7048/8730/files/jeduw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1996/8417/files/27523486363.pdf
    • https://cdn.shopify.com/s/files/1/0428/9619/5737/files/lexefiranalukiraratox.pdf
    • https://cdn.shopify.com/s/files/1/0435/9002/5375/files/88171817217.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99324429390.pdf
    • https://cdn.shopify.com/s/files/1/0430/9853/8151/files/28946073873.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/67447676637.pdf
    • https://cdn.shopify.com/s/files/1/0428/6165/8279/files/50264919766.pdf
    • https://cdn.shopify.com/s/files/1/0432/9734/1604/files/28325147158.pdf
    • https://cdn.shopify.com/s/files/1/0427/9212/4572/files/fekolotefafekolotijadanix.pdf
    • https://cdn.shopify.com/s/files/1/0434/7835/2022/files/82940154392.pdf
    • https://cdn.shopify.com/s/files/1/0428/5038/6079/files/wolipejigovojasunilatebiv.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_off00007146.bin
7b45072b92bc7a0ddcf9744278cbf3fe3eccf4242543a24c775512261e5c57e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7146 5304 bytes
font_01_sfnt_off00008332.bin
79ecda07f980f76cc346b56c660cf7982d1c5d5e849dd80c3ab289e847812b1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8332 10076 bytes
font_02_sfnt_off0000a55c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA55C 4324 bytes

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