Malicious PDF — malware analysis report

Static analysis result for SHA-256 3273c3ff81807fc0…

MALICIOUS

PDF

47.7 KB Created: 2020-07-22 23:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f712c94a945ff2c5e1a7640c823084b0 SHA-1: 4d416a72b8ba595c8872f35fe8d69ddb1e8f7947 SHA-256: 3273c3ff81807fc03e3f8e89049722bcc079c440eecc8a6b932f741bdb9544be
140 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to reference a 'Chevy cruze rs manual for sale', suggesting a lure to entice users to click on the malicious links. The presence of a 'PDF_SEO_LINK_FARM' heuristic further indicates a large number of outbound links, likely for SEO manipulation or to distribute malicious content. The 'SE_CALLBACK_LURE' heuristic suggests a potential callback phishing or tech-support scam context.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=chevy%20cruze%20rs%20manual%20for%20sale
    • http://files.gsm-inc.com/uploads/1/3/0/7/130776812/4198161.pdf
    • http://files.nmbseminar-sd.org/uploads/1/3/0/9/130969403/kebonulivafib.pdf
    • http://files.thatdrummerguy.com/uploads/1/3/1/3/131383982/4183514.pdf
    • http://files.mshamsi.com/uploads/1/3/0/7/130740193/f82cfb923e0e1.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/53514727925.pdf
    • https://cdn.shopify.com/s/files/1/0434/1488/0405/files/poraku.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/gumujojagewugenotugiwito.pdf
    • https://cdn.shopify.com/s/files/1/0431/6902/2109/files/79438441084.pdf
    • https://pakelito68704891.files.wordpress.com/2020/07/wijaweros.pdf
    • https://surizesudipu.files.wordpress.com/2020/07/lizujabojifakosinemogalaj.pdf
    • https://debemid.files.wordpress.com/2020/07/25193114807.pdf
    • https://wekunupapire.files.wordpress.com/2020/07/bovejelijabaf.pdf
    • https://viluxifapu.files.wordpress.com/2020/07/1597260145.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/taniseraguvifololesugom.pdf
    • https://cdn.shopify.com/s/files/1/0430/3349/3655/files/mivigobosafovajefu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7518/2485/files/11433560142.pdf
    • https://cdn.shopify.com/s/files/1/0427/8986/3580/files/48515877883.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rumifagekesodurelakalon.pdf
    • https://cdn.shopify.com/s/files/1/0432/9065/6924/files/desedup.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/lukozogodalusemez.pdf
    • https://cdn.shopify.com/s/files/1/0430/9037/8903/files/57456932313.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ganisififado.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_off00007d76.bin
1d65565b745983582e1554e1326d4edc5a9d739f2c38652c4979ecac7c431608		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D76 5112 bytes
font_01_sfnt_off00008ec3.bin
34fde9c1fce3b039762e69551a93d0709c23b2081a8626c948f01fdc566ecc91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC3 9924 bytes

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