Malicious PDF — malware analysis report

Static analysis result for SHA-256 82d0fc1f9aed238b…

MALICIOUS

PDF

54.0 KB Created: 2020-08-01 14:49:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8049f7c4ca63b6737e09c8a8962ee7e SHA-1: 9de8eff0514a94529d2e7c32cb531614a43630a5 SHA-256: 82d0fc1f9aed238b83706c0b5c144df5b29df558b91c8dbe87ba1ae68debce0a
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a link farm pointing to known malicious redirector infrastructure. The primary malicious URL is https://ttraff.ru/pify?keyword=jquery+get+current+date. The document body itself is heavily obfuscated but contains references to the same URL and other PDF files hosted on various domains, suggesting a coordinated effort to distribute malicious content or phish users. No scripts were extracted, limiting the analysis to the document structure and embedded links.

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=jquery+get+current+date
    • http://files.gravattjewellery.com/uploads/1/3/0/8/130874063/mutolofovubowek_kuzavirifesevum_xataluduz_pibawoxo.pdf
    • http://files.lifestyledetails.com/uploads/1/3/1/4/131437308/a2cde93b0d84d.pdf
    • http://files.priorecologylab.com/uploads/1/3/1/6/131606179/zemelipato_mekopan.pdf
    • http://files.kittymunger.com/uploads/1/3/0/7/130776745/suwevatapobasuv_lodemido_bemom_rabawopolojow.pdf
    • https://cdn.shopify.com/s/files/1/0429/0281/4876/files/bevozitegejutivazujeruxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/9148/3031/files/tixamimawov.pdf
    • https://cdn.shopify.com/s/files/1/0429/4184/1571/files/78534917928.pdf
    • https://cdn.shopify.com/s/files/1/0429/1896/9507/files/55032653462.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/69177710253.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/diwok.pdf
    • https://cdn.shopify.com/s/files/1/0433/0985/8984/files/32313159917.pdf
    • https://cdn.shopify.com/s/files/1/0435/0659/8040/files/149117664.pdf
    • https://cdn.shopify.com/s/files/1/0428/3216/7068/files/95732028259.pdf
    • https://cdn.shopify.com/s/files/1/0432/8338/2427/files/17200541929.pdf
    • https://cdn.shopify.com/s/files/1/0437/1709/9675/files/vunenemuwozagerejuwabo.pdf
    • https://cdn.shopify.com/s/files/1/0440/5254/5701/files/39666472630.pdf
    • https://cdn.shopify.com/s/files/1/0432/2911/8627/files/vojuguwuda.pdf
    • https://cdn.shopify.com/s/files/1/0432/1034/2564/files/viluserid.pdf
    • https://cdn.shopify.com/s/files/1/0428/3459/1907/files/59899104357.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_off000066ad.bin
8ec0fdc8387c7f9085b0c28ef3a4f8e462f3dd873fc68069f20469cafe482675		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66AD 4840 bytes
font_01_sfnt_off00007717.bin
2b06acabc83c103f45996e017315cb76e3f1c09b7639213d31c46cd7022ad666		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7717 6520 bytes
font_02_sfnt_off0000890b.bin
2556eab4ca1bc8fa8ec045f3a92652276d4ff6fdc2112c2c9c93ff5a7a376fd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x890B 16368 bytes
font_03_sfnt_off0000bca4.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCA4 4324 bytes

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