Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf1e7e249a3f4053…

MALICIOUS

PDF

54.6 KB Created: 2020-08-07 23:29:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd0ae8ad897b8021b2d932e7bc2b07c5 SHA-1: 51fb9a772013639ae0720425134dc5749b6d3f11 SHA-256: cf1e7e249a3f4053a00141b4fd0fb77a3abe176549b3fbe3e1379235b79ba49d
152 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, suggesting a link farm for SEO manipulation or to distribute malware. The primary malicious URL identified is a redirector service. No scripts were extracted, and the document body contained mostly binary data and a reference to the redirector URL.

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.cc/pify?keyword=chakrir+dak+pdf+download
    • http://files.dankoairguns.com/uploads/1/3/1/3/131379894/zujuzogeponuwomij.pdf
    • http://files.nickysawesomewebsite.com/uploads/1/3/1/6/131636692/1974110.pdf
    • http://vepomazo.wisedemocracy.org/uploads/1/3/0/7/130776167/wufawisumatom.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0120/files/numeros_primos_y_compuestos_6_primaria.pdf
    • https://cdn.shopify.com/s/files/1/0429/3702/4668/files/abstinencia_benzodiacepinas.pdf
    • https://cdn.shopify.com/s/files/1/0439/0558/1211/files/nabatutemibusor.pdf
    • https://cdn.shopify.com/s/files/1/0441/0766/1464/files/dungeons_and_dragons_3._5_monster_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/6807/0815/files/collins_vocabulary_for_ielts_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0440/7050/2565/files/tegigijoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1496/files/78897419369.pdf
    • https://cdn.shopify.com/s/files/1/0427/9664/6556/files/29776528949.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wudogezemolajefenupil.pdf
    • https://cdn.shopify.com/s/files/1/0446/5885/1993/files/map_of_drangleic.pdf
    • https://cdn.shopify.com/s/files/1/0439/4283/8427/files/82751987633.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovetutokukike.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a1e.bin
38025a1d06b184fa7f974b534087795e58e8aaa540eaae492fcb3cafc488e781		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A1E 4720 bytes
font_01_sfnt_off00007a20.bin
da5b137457e8903b2db1b0ae6fb126c720fed81abfe20b67a0c2e3904b038595		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A20 11524 bytes
font_02_sfnt_off00009db3.bin
f0c7863b623bbcf1fb22361bc31617059d5daab525ce9e4bc1a8f416ab3b3395		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DB3 9824 bytes
font_03_sfnt_off0000bf5e.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF5E 4324 bytes

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