Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4172a4088c9ac32…

MALICIOUS

PDF

48.5 KB Created: 2020-08-06 01:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40f0a246bbe053cf305c41e28f86dc83 SHA-1: c4cac3ebd0d2b37d792a80d28a0b60ef563774a4 SHA-256: e4172a4088c9ac323a81a351f168ad68076d47edaaebe8bdb3d5adc3e744c90c
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with heuristics indicating it functions as a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains text related to 'news report example pdf' and the URL that triggered the malicious redirector heuristic.

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.ru/pify?keyword=news+report+example+pdf
    • http://rosajin.studio-macs.com/uploads/1/3/1/0/131071252/wuzivozedafalakudixi.pdf
    • http://files.sutherlandbeatson.com/uploads/1/3/1/0/131070971/wapupi.pdf
    • http://files.thecrossingwv.com/uploads/1/3/0/7/130775002/nodowiniroperib.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/fajug.pdf
    • https://cdn.shopify.com/s/files/1/0432/1378/3199/files/microeconomics_besanko_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/rutolamipukabexota.pdf
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/29917821065.pdf
    • https://cdn.shopify.com/s/files/1/0434/2143/4023/files/nikujepimaremot.pdf
    • https://cdn.shopify.com/s/files/1/0431/3730/2690/files/wukogigikoruzab.pdf
    • https://cdn.shopify.com/s/files/1/0432/9707/9460/files/js_parent_node.pdf
    • https://cdn.shopify.com/s/files/1/0437/0772/8023/files/mulikubujibagumu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/hooch_urban_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0437/9371/1261/files/kiwobejipazutoduwusizapoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/9182/0711/files/5e_illusory_dragon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77330784460.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_off0000805a.bin
54da5c4e468d6a367655fc5880bb48680916a39e7de84aec9a909879df82fe89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x805A 5316 bytes
font_01_sfnt_off00009273.bin
87e65f33ee43d83158591e8b6fb84d0200fc825c2da4653c8483f1c1b89cab07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9273 10252 bytes

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