Malicious PDF — malware analysis report

Static analysis result for SHA-256 b96ae2b8fc5dce54…

MALICIOUS

PDF

67.2 KB Created: 2020-08-05 16:49:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9692db68c38ce18c89cf0b4bb51abf8c SHA-1: 3f05bf01deb68036249efd852badeb051baa9219 SHA-256: b96ae2b8fc5dce54e9e9797deebdfe7e0ae3a74feaf2e2b0ecf11fd502d04e40
120 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to manipulate search engine results, leading to a malicious redirector at ttraff.com. The document body, though obfuscated, contains keywords related to a dictionary download, suggesting a lure to entice users to click the malicious link. The presence of numerous embedded links to external PDFs, many hosted on Shopify, indicates a large-scale SEO poisoning or link farm operation.

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/pify?keyword=visual+english+vietnamese+chinese+trilingual+dictionary+pdf+download
    • http://files.stmwvenue.co.uk/uploads/1/3/1/8/131856769/jibup_suwiweve_bitiwi_jezunuge.pdf
    • http://files.oneshop42.com/uploads/1/3/0/9/130968958/3856478.pdf
    • http://files.treeservicejacksonmi.com/uploads/1/3/1/4/131483097/zudikem.pdf
    • http://files.indivisiblecrossville.org/uploads/1/3/0/7/130738991/59b6682.pdf
    • http://files.thebeprojectllc.com/uploads/1/3/0/7/130775840/fiselilisoruso.pdf
    • https://cdn.shopify.com/s/files/1/0436/2531/6514/files/fovidalejij.pdf
    • https://cdn.shopify.com/s/files/1/0429/8371/9071/files/nisexodokadanuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/4761/5649/files/97296117562.pdf
    • https://cdn.shopify.com/s/files/1/0435/8340/6243/files/tudilosebaxagikuguxepulup.pdf
    • https://cdn.shopify.com/s/files/1/0433/0163/4213/files/dimimuwakedevakewe.pdf
    • https://cdn.shopify.com/s/files/1/0431/5008/2202/files/guwijo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9793/9361/files/67613160342.pdf
    • https://cdn.shopify.com/s/files/1/0430/6803/1143/files/12548256164.pdf
    • https://cdn.shopify.com/s/files/1/0432/4301/2256/files/brownlie_principles_of_public_international_law_james_crawford.pdf
    • https://cdn.shopify.com/s/files/1/0433/4102/1334/files/59136236451.pdf
    • https://cdn.shopify.com/s/files/1/0434/0108/5082/files/memenivo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6618/7176/files/honda_gcv160_oil_capacity.pdf
    • https://cdn.shopify.com/s/files/1/0429/5363/8044/files/18766692723.pdf
    • https://cdn.shopify.com/s/files/1/0435/5060/5461/files/7355405712.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_off0000b314.bin
c023e5424987dfc648001390f8a6b6db74b096b1665a32437dab771c7d740490		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB314 5788 bytes
font_01_sfnt_off0000c6b6.bin
4be340b702c6efd89ae4b34abeb49e472fceacfeabdd5309d375520290399f8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B6 19932 bytes

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