Malicious PDF — malware analysis report

Static analysis result for SHA-256 9afaba55e6c82e0b…

MALICIOUS

PDF

37.1 KB Created: 2020-08-25 10:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62a4a8e514fa25d4272537c3410f3322 SHA-1: bc601822b9af06a9f79bf53d3197d3d2cc566619 SHA-256: 9afaba55e6c82e0b98d77a7257babdb53bfc41c4ee7a7e747d5fb01ade9cc3c9
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector infrastructure at `https://ttraff.ru/pify?keyword=biochemistry+h.+stephen+stoker+pdf+3rd+edition`. Another critical heuristic flagged the document as a link farm, with numerous links to shopify.com domains, likely intended to obscure the malicious redirector. The document body itself contains garbled text but includes the malicious URL and several benign-looking shopify URLs.

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=biochemistry+h.+stephen+stoker+pdf+3rd+edition
    • http://jujup.woofgangkennels.com/uploads/1/3/2/6/132682090/piferipo-folekapazu-jowiwaxiledo-linuguvasi.pdf
    • http://files.lorenzoscarling.com/uploads/1/3/0/9/130969918/gufojonilugeko.pdf
    • http://files.capillariesjournal.com/uploads/1/3/2/6/132680808/bb7260871b.pdf
    • https://cdn.shopify.com/s/files/1/0435/0679/4651/files/jedekisulopujigax.pdf
    • https://cdn.shopify.com/s/files/1/0428/4874/7676/files/luxitoduxekavorel.pdf
    • https://cdn.shopify.com/s/files/1/0429/3355/1260/files/diy_vacuum_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bivunamu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2352/4259/files/bratstvo_crnog_bodea_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/3195/1517/files/materialismo_historico_y_dialectico.pdf
    • https://cdn.shopify.com/s/files/1/0432/6948/8798/files/wemijuda.pdf
    • https://cdn.shopify.com/s/files/1/0437/5507/7786/files/durifa.pdf
    • https://cdn.shopify.com/s/files/1/0438/4178/1920/files/euclidean_algorithm_c.pdf
    • https://cdn.shopify.com/s/files/1/0434/4555/1271/files/fafalomekoxe.pdf
    • https://cdn.shopify.com/s/files/1/0434/6268/8918/files/candida_albicans.pdf
    • https://cdn.shopify.com/s/files/1/0431/4418/3974/files/jolole.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_off000051d5.bin
0d5c6bcaeb0d4d6ae0f68efcf95df7654c78e8cb0a57042518246ffd01b09a10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51D5 5564 bytes
font_01_sfnt_off000064a8.bin
94697580c89db56d8e9124e1d9a6475410c6da6151724c8d49f747939286a71c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A8 10092 bytes

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