Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e9911900e49906c…

MALICIOUS

PDF

52.1 KB Created: 2020-08-07 14:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6b282f586ddf849370ed2bfbefacca0 SHA-1: 08846d71343e6dfcd95c34bc354731d42322f6e3 SHA-256: 4e9911900e49906caf45849f30aa5b4f1301f754b1f7062f369eed2b9d342cd3
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing indicating a malicious redirector. The ML classifier also strongly flagged this PDF. The primary malicious activity appears to be directing users to potentially harmful content through a link farm, with the initial redirector being ttraff.com.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=arowana+breeding+pdf
    • http://files.top500albumreviews.com/uploads/1/3/0/7/130738562/3984093.pdf
    • http://pozojuzaf.goldenretrieversofidaho.com/uploads/1/3/1/6/131607062/rebutavenutemep.pdf
    • http://files.holmesbaptist.org/uploads/1/3/0/8/130813458/vonutil_papuponupurelo_nexidete_saliwudus.pdf
    • http://files.shalomlife.org/uploads/1/3/1/0/131069812/lagesomaxitit.pdf
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/46615766894.pdf
    • https://cdn.shopify.com/s/files/1/0428/2764/5084/files/brainstorming_games.pdf
    • https://cdn.shopify.com/s/files/1/0434/2641/4749/files/danob.pdf
    • https://cdn.shopify.com/s/files/1/0432/9730/8840/files/xanuxorinefiba.pdf
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/zijewapesigisezibonibir.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18410569865.pdf
    • https://cdn.shopify.com/s/files/1/0431/9661/2768/files/rolatoxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/96729161650.pdf
    • https://cdn.shopify.com/s/files/1/0439/2851/8824/files/chemistry_the_central_science_12th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/7368/3112/files/kusukezekesorutunodinu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5666/7541/files/asahikawa_city_map.pdf
    • https://cdn.shopify.com/s/files/1/0437/8286/5058/files/19950006024.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/7904117193.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_off0000891a.bin
100cc3ea4aaf4f0d22a1afd3c3da9c2e59792cd170cf714886bb39ff140ff518		 pdf-font-stream PDF embedded font (sfnt) at offset 0x891A 5220 bytes
font_01_sfnt_off00009afc.bin
c6ee80e7d4ae233d7587ebb6be018c5a54c5970f10f34ae72639f45213fa12d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AFC 12824 bytes

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