Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd16eb00f2c72209…

MALICIOUS

PDF

41.2 KB Created: 2020-08-25 09:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67cb1f808aba8e2f908538c35c11328f SHA-1: f7242fcc30420c261a6a294a9a06b4c59aee596f SHA-256: fd16eb00f2c722094aa0dbfd2844931fd59e8538fffb6ef3233217e11480d8ab
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, suggesting a link farm for SEO manipulation. One prominent link directs to a known malicious redirector, ttraff.com, which is disguised with a query parameter related to 'spelling worksheets for 10th grade'. This indicates a social engineering attempt to drive traffic to malicious infrastructure.

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.com/pify?keyword=spelling+worksheets+for+10th+grade
    • http://files.gettysburgchronicle.com/uploads/1/3/1/8/131856195/wigovafugijizuzasune.pdf
    • http://files.deangelisdonuts.com/uploads/1/3/0/8/130874599/df542b5.pdf
    • http://files.flhomeschoolevaluations.com/uploads/1/3/1/6/131606203/675334649df7b9c.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1777/files/xafaviwedutuxukokaxizozu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2855/2602/files/lodus.pdf
    • https://cdn.shopify.com/s/files/1/0430/8677/4436/files/31559520376.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kuvesagapixunijibofalase.pdf
    • https://cdn.shopify.com/s/files/1/0433/5029/4687/files/dutojezerowi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5959/2864/files/games_strategies_and_decision_making_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0433/8047/4014/files/12223026711.pdf
    • https://cdn.shopify.com/s/files/1/0431/0496/0661/files/61946825927.pdf
    • https://cdn.shopify.com/s/files/1/0448/2557/5581/files/69253470847.pdf
    • https://cdn.shopify.com/s/files/1/0439/0794/0520/files/jevaxodikezage.pdf
    • https://cdn.shopify.com/s/files/1/0439/2520/9256/files/diagnostico_cancer_de_pulmao.pdf
    • https://cdn.shopify.com/s/files/1/0432/3776/9383/files/40429179016.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_off0000611c.bin
5d43b311ffc78faf4b634335ff222f8f38efc5f6df36156dbbc7eb46602fd5b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x611C 5756 bytes
font_01_sfnt_off000074c2.bin
23349c25159bb1f7ae7a3a4a243d6d04dc0911ba70de686ad51a6e9d5580edce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74C2 10352 bytes

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