Malicious PDF — malware analysis report

Static analysis result for SHA-256 9550ec58c02ac856…

MALICIOUS

PDF

42.3 KB Created: 2020-10-08 17:14:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ff9cae02b0de858cee0443486967bad SHA-1: 2d5c83144a4d5901882d8b9c6274d2e6de859ed5 SHA-256: 9550ec58c02ac8560758e18b7e27aa3f899439de5b722190c38b28dd295a04ca
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is likely intended to deliver a payload. The document body also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on strikinglycdn.com and mozfiles.com, indicates a link farm designed to improve search engine ranking for the malicious download lure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://ggtraff.ru/pify?keyword=camerafi+live+apk+app+download
    • https://site-1040277.mozfiles.com/files/1040277/tisifubisuki.pdf
    • https://site-1043353.mozfiles.com/files/1043353/84873773215.pdf
    • https://site-1040251.mozfiles.com/files/1040251/gemafa.pdf
    • https://site-1048275.mozfiles.com/files/1048275/barirazofojezopog.pdf
    • https://site-1040574.mozfiles.com/files/1040574/84132312209.pdf
    • http://jodow.dfwdunndeals.com/uploads/1/3/1/3/131398516/lojajigurugirun.pdf
    • http://xenak.electropathi.com/uploads/1/3/2/7/132712323/rutefutizutixeperi.pdf
    • http://files.rram.ca/uploads/1/3/1/6/131606861/gebojofonu-kotifirasareren.pdf
    • http://files.uroresident.com/uploads/1/3/1/1/131164112/4422011.pdf
    • http://rimir.norfolkmedicalservices.com/uploads/1/3/1/3/131380429/4596694.pdf
    • https://uploads.strikinglycdn.com/files/3ec9f833-aa7d-49f1-889e-4f1d4bebadf4/29362999362.pdf
    • https://uploads.strikinglycdn.com/files/c806317d-d3be-4df4-bddc-3cdc5b807794/75012098991.pdf
    • https://uploads.strikinglycdn.com/files/2e6533c7-e42c-4e0e-9dd5-e2d5f540a939/dapimikas.pdf
    • https://uploads.strikinglycdn.com/files/d0e70366-051e-4d76-9bbc-ba95e80c3d66/megodugoxuxekewuposokomoz.pdf
    • https://uploads.strikinglycdn.com/files/7ca73c18-a639-4479-8864-40551ba5b445/55991378462.pdf
    • https://uploads.strikinglycdn.com/files/16972deb-2079-40a8-9f00-2eedeebbd9af/mezojopofewej.pdf
    • https://uploads.strikinglycdn.com/files/db4a5a29-f82a-4f9a-bd17-b5ccae34e448/vefogepenikenalomuxep.pdf
    • https://uploads.strikinglycdn.com/files/c78406d6-c725-4b52-894c-caae5ab244e4/doruvonelujoj.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_off0000674b.bin
9717df7eb3782c16ed2ed1ed4d09c1c0f2e7a16b6f2252bd0271c48bcda4dbdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x674B 5128 bytes
font_01_sfnt_off000078bd.bin
a1326d93978b58f61e25a72b9e9331fc23d7aa021d3c1a9228fabd2b1dc92086		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78BD 10476 bytes

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