Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cf1a19f8486c4e7…

MALICIOUS

PDF

42.7 KB Created: 2020-08-04 10:47:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 673721e07506250a8f73253f5d73194a SHA-1: acfd86cff63cceda162ca917783451619a87cd39 SHA-256: 5cf1a19f8486c4e7e9c12043f0f6f87e6bc90dce582b4f56ff29972444e09a2e
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify and other domains, forming a link farm. The primary malicious link, https://ttraff.com/pify?keyword=symbolic+violence+definition+pdf, is identified as a known malicious redirector. The document's content, though partially obfuscated, includes the URL and appears to be a lure for users seeking information on "symbolic violence". No scripts were extracted, but the extensive use of external links suggests an attempt to drive traffic to malicious infrastructure.

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.com/pify?keyword=symbolic+violence+definition+pdf
    • http://files.amgriffinbooks.com/uploads/1/3/2/6/132695574/zonewimebefanivitat.pdf
    • http://files.gochamber.org/uploads/1/3/2/6/132695829/jagebimironejufigu.pdf
    • http://files.livingwellstudios.com/uploads/1/3/1/3/131384429/359346.pdf
    • http://files.seewhy.info/uploads/1/3/1/3/131381374/7598578.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8561/7566/files/ropuralerise.pdf
    • https://cdn.shopify.com/s/files/1/0433/4013/6601/files/remove_duplicates_from_sorted_array.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/26245121057.pdf
    • https://cdn.shopify.com/s/files/1/0428/9085/4566/files/33760898094.pdf
    • https://cdn.shopify.com/s/files/1/0428/5802/1027/files/vibutadajupib.pdf
    • https://cdn.shopify.com/s/files/1/0434/0717/9941/files/jenala.pdf
    • https://cdn.shopify.com/s/files/1/0430/4545/3985/files/56218010298.pdf
    • https://cdn.shopify.com/s/files/1/0433/6487/6453/files/walowugowo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1611/files/revevebapin.pdf
    • https://cdn.shopify.com/s/files/1/0436/5592/1817/files/jozokitovaxerejarikir.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/42708497686.pdf
    • https://cdn.shopify.com/s/files/1/0432/4071/8496/files/99909259101.pdf
    • https://cdn.shopify.com/s/files/1/0438/2638/0960/files/fawijejobabunirudediga.pdf
    • https://cdn.shopify.com/s/files/1/0433/7837/6867/files/71686559601.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069e6.bin
0858d397abbe313b31ba000af3f8dad25b3c2b7782590f43c2990052d3658fe9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E6 5220 bytes
font_01_sfnt_off00007baf.bin
afacf8b6c8d2eda97ec2d74fb01e3c3c2c5c5ae5c02e21e3e700272a22132d39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BAF 9940 bytes

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