Malicious PDF — malware analysis report

Static analysis result for SHA-256 55d376cac99b3e1e…

MALICIOUS

PDF

49.7 KB Created: 2020-08-06 16:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a3e47523c554d211bd53a2e5d2070de SHA-1: 02c6234c87af34e75127e516b69aaa2ba60430a9 SHA-256: 55d376cac99b3e1e681445c99ab89190a5ccc35f09423be27f83ef62099a9030
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 a redirector service. The primary malicious URL identified is https://ttraff.ru/pify?keyword=social+media+action+plan+pdf, which is likely used to direct users to further malicious content. The document body itself is heavily obfuscated and contains the same malicious URL, reinforcing the intent to redirect users. No scripts were extracted from this sample.

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=social+media+action+plan+pdf
    • http://files.stjohnschurchcolumbus.org/uploads/1/3/0/7/130740069/d0a55a.pdf
    • http://files.quintessencemc.com/uploads/1/3/1/6/131637357/jijozexuwuzedibi.pdf
    • http://files.mariasperanza.com/uploads/1/3/0/8/130814575/d297dafc83fb.pdf
    • http://files.kattulafamilyfarms.com/uploads/1/3/0/8/130874620/lazufadexuril.pdf
    • http://files.funkshunalgroove.net/uploads/1/3/1/4/131407235/fopabugoriloduz.pdf
    • https://cdn.shopify.com/s/files/1/0435/6951/2607/files/ruwiti.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/kurireri.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/3355043265.pdf
    • https://cdn.shopify.com/s/files/1/0438/5167/7856/files/21393113122.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/sowonoxijikawadazi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3604/7522/files/sign_adobe_doc.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/buddhist_anarchism.pdf
    • https://cdn.shopify.com/s/files/1/0437/9063/1064/files/58562595802.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87899810879.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51191810805.pdf
    • https://cdn.shopify.com/s/files/1/0436/3337/7440/files/17653882154.pdf
    • https://cdn.shopify.com/s/files/1/0435/3395/9327/files/malachi_brendan_martin.pdf
    • https://cdn.shopify.com/s/files/1/0432/9524/4441/files/poverty_alleviation_programmes_in_nigeria.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86372263330.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/
    • https://cdn.shopify.com/s/files/1/0432/9524/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000086b5.bin
f2e66899b5d3789e9829125b0b2b9767ba84811f09441422f1f5258be47f9a64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86B5 5128 bytes
font_01_sfnt_off0000981f.bin
c53b2751ff2ae5a1beffa34b21cb59b6d533ea38c6fdc77b4cfb27dd2d88fe02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x981F 9920 bytes

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