Malicious PDF — malware analysis report

Static analysis result for SHA-256 4485c9560bee0ff3…

MALICIOUS

PDF

32.7 KB Created: 2020-08-14 00:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84269c4bb91c7b6871294a7a12e6024f SHA-1: 02f1db7f9c0ad2cebbd206759470fd300613046c SHA-256: 4485c9560bee0ff3fdb136c873a3f8cf1692907ddd70cd79ed671d5ee5f146a7
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wb?keyword=rebar%20bender%20manual', suggesting a lure to a malicious site. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

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.com/wb?keyword=rebar%20bender%20manual
    • http://keger.sojofireproject.org/uploads/1/3/0/7/130739777/446072.pdf
    • http://files.westernwc.info/uploads/1/3/0/9/130969300/9471533.pdf
    • http://files.allseasonssportsmensexpo.com/uploads/1/3/0/8/130814758/3050677.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/feful.pdf
    • https://cdn.shopify.com/s/files/1/0438/5275/9200/files/42808147832.pdf
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/titijugume.pdf
    • https://cdn.shopify.com/s/files/1/0429/0599/3375/files/navilag.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/last_remnant_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0431/8396/4324/files/vinomaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/5420/2018/files/fozodabagu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1077/6473/files/the_adventure_of_tom_sawyer_bangla.pdf
    • https://cdn.shopify.com/s/files/1/0433/3145/3081/files/vowoxixuvepatojonaselari.pdf
    • https://cdn.shopify.com/s/files/1/0428/6346/0508/files/pafonitafur.pdf
    • https://cdn.shopify.com/s/files/1/0434/3991/5164/files/waec_technical_drawing_past_questions.pdf
    • https://cdn.shopify.com/s/files/1/0435/1619/9064/files/46817055953.pdf
    • https://cdn.shopify.com/s/files/1/0431/6630/2376/files/romoloxerokimukunurotufeg.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_off000045c4.bin
1e44519c9f483ea28ae31b8fae18648864dc10dcd2731ca28a8e06193ce4832e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45C4 4940 bytes
font_01_sfnt_off00005676.bin
188faf430ca8138b94fc3bb807b185a483a05cf5f332abec61326e99d0c7ee77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5676 9360 bytes

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