Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd025f97038f493…

MALICIOUS

PDF

46.3 KB Created: 2020-08-20 02:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fe1a5cbadbc8eab1e85a71e4fe4dfdb SHA-1: 8533b1ee8ef2e37b9dfe0e212727e6e8d709e8d6 SHA-256: 1fd025f97038f493525e8ecd097a3e3059bd7c521b5854a0bd8547f6ca12f67a
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to redirectors or unknown domains. One critical heuristic identified a link to known malicious redirector infrastructure. The document body text, though heavily obfuscated, contains the string 'Bazaar app free' and a URL that matches the malicious redirector. This suggests the document is a lure to trick users into visiting malicious sites.

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=bazaar+app+free
    • http://mamodow.scouttrout.com/uploads/1/3/1/8/131857054/e3669e802.pdf
    • http://xumov.jaylethbridgephotography.co.uk/uploads/1/3/2/7/132710780/zajupefelorelej-mixig.pdf
    • http://files.hedgerow-herbals.com/uploads/1/3/1/6/131606094/cfe3859d.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1297022614.pdf
    • https://cdn.shopify.com/s/files/1/0438/3863/6192/files/happy_birthday_to_you_chords.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9157/files/93877516587.pdf
    • https://cdn.shopify.com/s/files/1/0429/8693/0329/files/dinebiwetul.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0658/files/jirizawazenikulini.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nenipuwewof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97454987384.pdf
    • https://cdn.shopify.com/s/files/1/0429/3296/1443/files/purimigulokaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/20868323961.pdf
    • https://cdn.shopify.com/s/files/1/0435/3772/7637/files/gatokug.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/where_is_the_left_stick_on_xbox.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5809/files/stonesour_wicked_game.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006043.bin
fc82e4ddfa9cd17853be641f3846ebe979fe6ca939bcbdab30bacf27f8ae8761		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6043 4784 bytes
font_01_sfnt_off000070a1.bin
bafa8190916e0537bd1bff1c772a2f33228f0de2d2378c25cb3e8d7c28d88057		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A1 11220 bytes
font_02_sfnt_off000096c1.bin
69d723212eb6dd1954cef9b4649bd4df6eb17a6f495b2db8137d34beed6776af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96C1 16332 bytes

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