Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd417404c07eb84c…

MALICIOUS

PDF

76.1 KB Created: 2020-08-11 14:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 157429d959a5b3225e9daea460f983f1 SHA-1: 0dea98f04be35c900767f6fc622f92cdfc98e7c7 SHA-256: bd417404c07eb84c91a66b6ef40ca0b76475349b54d0749ab1351cf78fcd5aa8
152 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector infrastructure, specifically 'ttraff.ru'. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Campylobacter fetus en bovinos pdf'. The presence of numerous external links, many pointing to potentially malicious domains, suggests a link farm or redirection scheme designed to lead the user to malicious content. No scripts were extracted from this sample.

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=campylobacter+fetus+en+bovinos+pdf
    • http://bupiz.delorenzodachshund.com/uploads/1/3/1/3/131380429/rigatiberovamo_bilururanaw_vigur.pdf
    • http://files.pamserrawenz.com/uploads/1/3/1/4/131437285/doroxi_joxixuluj_tutifubezej_jetozopididom.pdf
    • http://files.cvillematerials.com/uploads/1/3/2/6/132682892/detifomepolulodal.pdf
    • http://lanut.yukonchocolate.ca/uploads/1/3/2/7/132710592/3888661.pdf
    • https://cdn.shopify.com/s/files/1/0428/8079/4790/files/35695628074.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2426/files/sherlock_holmes_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/5263/7091/files/hp_8610_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/3504/9640/files/gegoj.pdf
    • https://cdn.shopify.com/s/files/1/0448/0411/2545/files/femok.pdf
    • https://cdn.shopify.com/s/files/1/0435/4749/2506/files/76101878783.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/lijosogepupabiwezedesab.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/66146201975.pdf
    • https://cdn.shopify.com/s/files/1/0435/9267/9582/files/75830656356.pdf
    • https://cdn.shopify.com/s/files/1/0437/5350/4917/files/fekemaweweku.pdf
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/suwiripebis.pdf
    • https://cdn.shopify.com/s/files/1/0428/1624/1831/files/koxanoxiwegob.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_off0000e152.bin
22976f9b8b818552fce990bb367f09c02cd8a1b622300463bad769e338fea185		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE152 5508 bytes
font_01_sfnt_off0000f3f8.bin
54800217e0bdab6a0652dc3c325351488f93f1dbab54dcba8732948bcf8ee3ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F8 2048 bytes
font_02_sfnt_off0000fcdb.bin
4aba4a2c9a001eb123a6f3fc97665cc73e6de5b75bd944cd18e91fa3f9cac6a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDB 10536 bytes

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