Malicious PDF — malware analysis report

Static analysis result for SHA-256 b968812e4d44a90b…

MALICIOUS

PDF

43.4 KB Created: 2020-08-06 15:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1d31a9cd4735f8feb9b8a5de2aaa609 SHA-1: dd927d2b83f8daf84baf05966c031aa06ec0b8f7 SHA-256: b968812e4d44a90bad2417f1f2e1a758880ee8e8654ff66f4009f2409c443d2b
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, characteristic of an SEO link farm designed to manipulate search engine rankings or distribute malicious content. One of the URLs, https://ttraff.com/pify?keyword=begone+unbelief+pdf, is identified as a known malicious redirector, indicating a high likelihood of user redirection to harmful sites. The ML classifier also strongly flagged this PDF as malicious.

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://ttraff.com/pify?keyword=begone+unbelief+pdf
    • http://files.daretodreamwv.com/uploads/1/3/0/7/130774969/togotowofudip-lebojifawomujo-vipon.pdf
    • http://files.jacksonholeeventmusic.com/uploads/1/3/1/4/131406036/rixuzikizuwola.pdf
    • http://likux.maths180.com/uploads/1/3/2/6/132695663/nisaforokamirixiz.pdf
    • http://files.ro.megaplot.org/uploads/1/3/2/6/132681823/65b7e69dc53.pdf
    • http://files.rmlegaldocumentpreparation.com/uploads/1/3/1/6/131607075/faroj.pdf
    • https://cdn.shopify.com/s/files/1/0433/5301/4427/files/xekerojililelosowekeforeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wajomuxufukurojudi.pdf
    • https://cdn.shopify.com/s/files/1/0437/4292/0865/files/mass_effect_2_zaeed_dlc.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7896/files/74719729723.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/susat.pdf
    • https://cdn.shopify.com/s/files/1/0435/0102/7493/files/dusonexowupaketol.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5199/files/63628353740.pdf
    • https://cdn.shopify.com/s/files/1/0434/8497/1173/files/votix.pdf
    • https://cdn.shopify.com/s/files/1/0435/9720/1567/files/suvasosawuwulep.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/ketegixas.pdf
    • https://cdn.shopify.com/s/files/1/0429/8578/3447/files/ase_g1_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0432/3321/4621/files/surisotozerisov.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_off00005ec5.bin
32e4aba6287845b524e6028631c3699103d5261b80974b8d8daa638c7a3ce291		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC5 4716 bytes
font_01_sfnt_off00006ed8.bin
5565eb17fc238b5f31b2c4a275ef1964dd3a40d8a2b4f1fb9a652f1e8abf4807		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED8 10548 bytes
font_02_sfnt_off000092e3.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92E3 4324 bytes

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