Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c3855a736a792ba…

MALICIOUS

PDF

52.2 KB Created: 2020-08-07 09:09:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a5be55eef3c62975fb36486970bcb09 SHA-1: 46b611a4d4992a04442afb9dc814303df4ac989a SHA-256: 1c3855a736a792ba3b0ebb896bedbea5b245acba596ad9d23433761686c66bab
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is disguised as a search result for a book. This suggests a phishing or social engineering attack aiming to redirect users to malicious content. No scripts were extracted, limiting the analysis of direct payload delivery.

Heuristics 3

  • 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.
  • 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/wb?keyword=a%20long%20way%20down%20book%20nick%20hornby%20pdf
    • http://files.siglapscec.com/uploads/1/3/2/6/132682113/mevesoroximex_rogavadoduvaj_vemezob.pdf
    • http://files.zacksguttering.com.au/uploads/1/3/1/0/131070374/pewixasoxiken_gorotu_vameta.pdf
    • http://files.pnhsbaseball.com/uploads/1/3/1/4/131453267/1000168.pdf
    • http://tifuxemi.fbckilbourne.com/uploads/1/3/0/7/130738531/parediwiza.pdf
    • http://files.associatedoptical.com/uploads/1/3/1/4/131453214/peruvisite-valolufifo-nusoloseguzonev.pdf
    • https://cdn.shopify.com/s/files/1/0433/9220/4950/files/wivebunoguzisuxalere.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2623/files/real_time_applications_of_artificial_intelligence.pdf
    • https://cdn.shopify.com/s/files/1/0429/9957/8773/files/68524651506.pdf
    • https://cdn.shopify.com/s/files/1/0432/6077/2516/files/phonics_world.pdf
    • https://cdn.shopify.com/s/files/1/0432/5592/2852/files/69759771731.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/lerufomukomigipalawowusu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3294478915.pdf
    • https://cdn.shopify.com/s/files/1/0432/5382/5694/files/47375107517.pdf
    • https://cdn.shopify.com/s/files/1/0433/3892/4181/files/kovifabulabolemegasob.pdf
    • https://cdn.shopify.com/s/files/1/0430/9961/9492/files/bixibene.pdf
    • https://cdn.shopify.com/s/files/1/0432/8331/6891/files/88806222891.pdf
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/94326679673.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/gupajefewimivemukori.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_off00008dc8.bin
d96749929f418e66fa432af02515d479fc48dd4c6aa4f2dcee2fd58d2d9e3d08
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC8 5624 bytes
font_01_sfnt_off0000a107.bin
2de7ffef193c1ba6f4e1f9136c9defd778988603ae54ebe76a61d2340f531b4d
pdf-font-stream PDF embedded font (sfnt) at offset 0xA107 10088 bytes