Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e91639675a0ad05…

MALICIOUS

PDF

50.4 KB Created: 2020-08-21 23:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 841fbc59a95cacbe72a19a92ce5baa42 SHA-1: b68ac8d5bf9e82ef28fa93583cf922045724aae2 SHA-256: 9e91639675a0ad055a65e08d5ffc3d2e7400f39d08c64079c0dda8ac1c0aacb4
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though partially corrupted, contains text related to a 'Post office certified copy form', suggesting a social engineering lure. The file also exhibits characteristics of a link farm, embedding numerous external PDF links, many of which are hosted on potentially suspicious subdomains. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=post+office+certified+copy+form
    • http://zujeg.gpcsdnewteacherorientation.com/uploads/1/3/1/4/131454415/lejixavareg-sukuxu-kumigagarixepuz.pdf
    • http://files.peakhealthcaremaryland.com/uploads/1/3/1/4/131406816/rizapisopasiraluzoga.pdf
    • http://files.faithhometeam.com/uploads/1/3/0/8/130815026/riwadotelodebijude.pdf
    • http://voxokawuv.just-us-justice.com/uploads/1/3/0/7/130775934/9393508.pdf
    • http://goleji.annawitte.org/uploads/1/3/0/7/130776367/48aa61.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/tasks_and_duties_of_a_tour_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/7004/5864/files/bakogerizisesalid.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2465/files/lactic_acid_bacteria_classification.pdf
    • https://cdn.shopify.com/s/files/1/0438/2697/0786/files/33543739295.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30551251375.pdf
    • https://cdn.shopify.com/s/files/1/0435/0764/6630/files/clean_code_by_robert_martin.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4840/files/kodogonasoxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4778/8450/files/vasezunifonaxiladuxol.pdf
    • https://cdn.shopify.com/s/files/1/0437/2656/9633/files/53855273744.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1741436775.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_off0000775d.bin
5fe9bfad5e0127ad4321415dfc21af102d6e2ee865726b5b5fe744f594222dd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x775D 5164 bytes
font_01_sfnt_off000088d6.bin
488ffee5e9c33bcc1f3f00aec749f35977d0cdd209ffadaee35194d66ecc177d
pdf-font-stream PDF embedded font (sfnt) at offset 0x88D6 6148 bytes
font_02_sfnt_off000098b6.bin
d6156bc8b0c39b9dd558053e57b4ead1c026035534507e594762cd7985bb9140
pdf-font-stream PDF embedded font (sfnt) at offset 0x98B6 10428 bytes