Malicious PDF — malware analysis report

Static analysis result for SHA-256 576810d3765fe569…

MALICIOUS

PDF

57.2 KB Created: 2020-07-24 00:47:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 488b459540152275a4fadf53581752e9 SHA-1: 3fddf9a40f475e53a06244da14f8c08219c54948 SHA-256: 576810d3765fe56986c4a30dcc27868d931c593ebe391e31cd977c2016cb1c5c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, suggests it is disguised as educational material ('Worksheet for grade 1 evs'). The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=worksheet+for+grade+1+evs', which likely serves as a gateway to further malicious content or phishing pages. The presence of many links hosted on cdn.shopify.com, even if some are marked benign, indicates a link farm strategy.

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=worksheet+for+grade+1+evs
    • http://files.exodusblog.com/uploads/1/3/1/6/131606256/pijelo.pdf
    • http://files.leoniehigginsnoone.com/uploads/1/3/0/7/130775277/8797331.pdf
    • http://files.beefalonorthwest.com/uploads/1/3/1/8/131871433/tukijunutus.pdf
    • http://files.christianpensel.com/uploads/1/3/1/4/131454459/8010404.pdf
    • http://files.annelisestenseth.com/uploads/1/3/1/4/131482884/wutufonid_latijevunogid.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/zuwawewod.pdf
    • https://cdn.shopify.com/s/files/1/0430/5226/9717/files/nepuridekisorowem.pdf
    • https://cdn.shopify.com/s/files/1/0429/5737/3589/files/46343670304.pdf
    • https://cdn.shopify.com/s/files/1/0440/6748/7894/files/90079947780.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9142282406.pdf
    • https://cdn.shopify.com/s/files/1/0441/1808/1688/files/86806674847.pdf
    • https://cdn.shopify.com/s/files/1/0430/0092/2261/files/zobesivotepikaxapa.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/62318153297.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5558/files/duzarebug.pdf
    • https://cdn.shopify.com/s/files/1/0431/1498/7674/files/6029994622.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9880/files/99646687180.pdf
    • https://cdn.shopify.com/s/files/1/0432/7620/6240/files/nategadelo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075d8.bin
de1ee113c9d5b6e644bf631c9f4a90b90d2eca29d49e7190013b3c22c49d4890		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75D8 4960 bytes
font_01_sfnt_off000086e2.bin
20cc4dfd5dbbf3820330b72de64f2c176cc528799433e9762ab6806667b8c60b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86E2 7144 bytes
font_02_sfnt_off00009afe.bin
0e29c07bafb14c80b9f18c002c7e7e78be92655579bd3d29d4d822c1765c3bc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AFE 10040 bytes
font_03_sfnt_off0000bd8e.bin
459bc91fdd7ab87ea9ebc1797b1a3b948737d9d3234b6cc534cb86313abda916		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD8E 17492 bytes

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