Malicious PDF — malware analysis report

Static analysis result for SHA-256 71457b600d264511…

MALICIOUS

PDF

46.1 KB Created: 2020-08-03 22:32:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e7ad37d5f8c9484693371e87f92420f SHA-1: ac3d76258eedf3eb21945a5149ed980aa0b59a99 SHA-256: 71457b600d264511fb0c18d050005d2e04b63e9d7463aaaea2f549fa9c1ae7f6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'malicious software in network security'. The primary malicious URL identified is https://ttraff.cc/pify?keyword=malicious+software+in+network+security+pdf, which likely serves as a redirector to further malicious content. No scripts were extracted, but the presence of many external links suggests a link farm or redirection attack.

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.cc/pify?keyword=malicious+software+in+network+security+pdf
    • http://files.webstriple.com/uploads/1/3/1/4/131453194/farudeganame.pdf
    • http://files.digitalpreschool.com/uploads/1/3/1/6/131607053/89e472ca7e2f.pdf
    • http://files.oakland-baptistchurch.com/uploads/1/3/1/0/131070633/kumegodejevofofivu.pdf
    • http://files.imagefilmandphotography.com/uploads/1/3/2/3/132303239/tadawuponizuvawet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/8312/8214/files/baposuvovowape.pdf
    • https://cdn.shopify.com/s/files/1/0437/1621/4939/files/46643708224.pdf
    • https://cdn.shopify.com/s/files/1/0429/4275/9071/files/suwadokufi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6796/4580/files/juvadulen.pdf
    • https://cdn.shopify.com/s/files/1/0434/9001/7430/files/54946969023.pdf
    • https://cdn.shopify.com/s/files/1/0432/5516/9186/files/41691520564.pdf
    • https://cdn.shopify.com/s/files/1/0429/8116/3157/files/49033305441.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/12555053714.pdf
    • https://cdn.shopify.com/s/files/1/0437/6874/2040/files/74939771279.pdf
    • https://cdn.shopify.com/s/files/1/0440/8170/9206/files/nurud.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4481/files/latex_bar_over_letter.pdf
    • https://cdn.shopify.com/s/files/1/0429/7008/7587/files/456036900.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006884.bin
e6a67b7432b26d3e469d640d9b63643bfde775cbaacc4df71f4c1238665c0bc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6884 5296 bytes
font_01_sfnt_off00007aa6.bin
864eb13f867464cd5f1952cd909b6d4d6b5eb73e5b8b2265e03725e2d6dd66b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA6 9972 bytes
font_02_sfnt_off00009ccd.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CCD 4324 bytes

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