Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f8448234d572e75…

MALICIOUS

PDF

72.8 KB Created: 2020-08-03 15:10:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 090b054d447d79dac0626aef9bd849b4 SHA-1: b0124dc8a68ba4710cd21773a62593c461dc8ae6 SHA-256: 2f8448234d572e752e996bfe6241e29681e37aacb14ceae348888581b3e61e08
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=perimetry+interpretation+pdf'. The document body, though heavily obfuscated, contains text related to 'perimetry interpretation pdf', suggesting a lure to trick users into clicking the malicious link. The presence of many Shopify-hosted PDF links suggests a link farm or SEO poisoning attempt.

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=perimetry+interpretation+pdf
    • http://files.overcomeporn.org/uploads/1/3/1/6/131637362/7606694.pdf
    • http://files.beatricestravelingboutique.com/uploads/1/3/0/8/130814769/xudipegobi.pdf
    • http://files.maryanndipietro.com/uploads/1/3/0/7/130740586/1071086.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/vatufifa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5067/2026/files/bash_parse_arguments.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/witafa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8962/5250/files/kezomapaworiroxavu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7348/files/wasorutazudapiseb.pdf
    • https://cdn.shopify.com/s/files/1/0429/5937/2439/files/16365231942.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/40029499059.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5080/files/27435910640.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/80511869052.pdf
    • https://cdn.shopify.com/s/files/1/0435/1816/5146/files/sozolemoxosa.pdf
    • https://cdn.shopify.com/s/files/1/0435/5319/4133/files/kilojutapurimada.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c381.bin
dbe2d1cc5a8d2d99577f7ea5e7f92343299930cf0c035e365d277a8801dedb05		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC381 4868 bytes
font_01_sfnt_off0000d3e6.bin
488ffee5e9c33bcc1f3f00aec749f35977d0cdd209ffadaee35194d66ecc177d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E6 6148 bytes
font_02_sfnt_off0000e3c6.bin
e3480e8b946ac223fc09f15e00adb84aca3f117ea02cee791f6da632f4720380		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C6 10472 bytes
font_03_sfnt_off0001079b.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1079B 4324 bytes

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