Malicious PDF — malware analysis report

Static analysis result for SHA-256 94294d679553b027…

MALICIOUS

PDF

43.5 KB Created: 2020-08-11 01:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 149a573ce12b9ebdc0c0d426e5617ca2 SHA-1: 7e41dfadc55e7a22708c1b62736f13d7ca9c2dff SHA-256: 94294d679553b0275c24e69b725ad59ec5336dbe9bae2f3eef3c68632d04412a
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or traffic redirection. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is likely the primary malicious component. The ML classifier also strongly indicated maliciousness. No scripts were extracted, limiting the analysis of direct payload delivery or execution.

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=c+est+ou+il+est+exercices+pdf
    • http://paxuf.dancefactoryply.com/uploads/1/3/1/6/131636725/1311478.pdf
    • http://files.hiddensuccesstactical.com/uploads/1/3/2/6/132681210/lidobe-gexinatonatiru-dulurub.pdf
    • http://files.hutchingsfraktur.com/uploads/1/3/2/6/132681617/nidevovituvuz.pdf
    • http://files.pointclearcattery.com/uploads/1/3/1/1/131163507/08e4ba7a1bc0b8.pdf
    • https://cdn.shopify.com/s/files/1/0432/9232/8104/files/gmp_practices_in_food_industry.pdf
    • https://cdn.shopify.com/s/files/1/0432/4674/7803/files/pewdiepie_minecraft_skin.pdf
    • https://cdn.shopify.com/s/files/1/0434/0560/7079/files/the_general_prologue_to_canterbury_tales.pdf
    • https://cdn.shopify.com/s/files/1/0432/9373/7110/files/67077501802.pdf
    • https://cdn.shopify.com/s/files/1/0437/0294/3909/files/important_days_in_tamil_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/7686/1606/files/95841101473.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0728/files/kasofe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3248/5799/files/jidefoxiroxoman.pdf
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/autocad_underlay_to_lines.pdf
    • https://cdn.shopify.com/s/files/1/0437/2496/3990/files/6182865832.pdf
    • https://cdn.shopify.com/s/files/1/0436/5330/0377/files/38833601865.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0226/files/5727969832.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/19202166169.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068b5.bin
a58a18135b8bc77c9ae60e5d8dfcd83efaeef5e7fe20cdfdb3bfaea785ee3ccf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68B5 4912 bytes
font_01_sfnt_off00007980.bin
5bc731b4f38653ecdce346f9f1242767740ff96533c555ade74c18b95ec76b73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7980 12056 bytes

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