Malicious PDF — malware analysis report

Static analysis result for SHA-256 f22f46caff1a5507…

MALICIOUS

PDF

60.3 KB Created: 2020-07-31 19:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73e95dacd18228a2bbc14ea2e10cc6b9 SHA-1: 8322124cdb31570cb88b02b90eaf01eda7d159cd SHA-256: f22f46caff1a550730bc872f2b3e4cd0134413acdb2da07e7e6284d27af3cb5d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector at 'ttraff.cc'. The document body text, though heavily obfuscated, contains the string 'Dnd saving throw', suggesting a lure to entice clicks. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the presence of a link to malicious infrastructure, and 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, typical of SEO poisoning or link farm abuse to distribute malware.

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.cc/pify?keyword=dnd+saving+throw
    • http://files.oriskanycreekfarm.com/uploads/1/3/1/8/131871674/9e9b319.pdf
    • http://files.windyflatfarm.com/uploads/1/3/0/7/130776111/6d294e6f852aa.pdf
    • http://files.brazossunrisefarms.com/uploads/1/3/2/7/132740997/ea0d50e52d6705.pdf
    • http://files.basilicasm-loretto.org/uploads/1/3/0/7/130775645/bemifid.pdf
    • http://files.artbank.gallery/uploads/1/3/0/7/130775518/f34294e09f7.pdf
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/zetilipolimegidozebojuv.pdf
    • https://cdn.shopify.com/s/files/1/0427/7082/5382/files/77108915714.pdf
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/31862492826.pdf
    • https://cdn.shopify.com/s/files/1/0428/9003/5366/files/fuvuwupuxofar.pdf
    • https://cdn.shopify.com/s/files/1/0439/8376/5662/files/wuzumevupababelofoxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2476/1507/files/46444283806.pdf
    • https://cdn.shopify.com/s/files/1/0433/7880/2846/files/86758347150.pdf
    • https://cdn.shopify.com/s/files/1/0431/2724/2903/files/53233532117.pdf
    • https://cdn.shopify.com/s/files/1/0434/0590/1991/files/24245051667.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/ludufezosamuvu.pdf
    • https://cdn.shopify.com/s/files/1/0436/2112/2211/files/tosagudutizipepi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3260/7894/files/91151204948.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_off0000af53.bin
4fb23bf48b0b576f90c66ba7ddbd1121c00bc693ba1126922d90935bd0b64b90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF53 5208 bytes
font_01_sfnt_off0000c11e.bin
6ca70a9af4690d770e14eafc7a5ac95d08c499b669aba98ea872397c720728f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC11E 10268 bytes

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