Malicious PDF — malware analysis report

Static analysis result for SHA-256 629cff4897cd73ef…

MALICIOUS

PDF

48.1 KB Created: 2020-08-01 09:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6e24d023bff3554f97a097057e1e4e0 SHA-1: 05fd09d6f21002a9ae3b51046c531cb0deadf500 SHA-256: 629cff4897cd73ef6f9be35b8530300d514d38c7c88f1180caa9ab230c8f70d4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links, including one identified as a malicious redirector. The primary link, 'https://ttraff.cc/pify?keyword=c+export+to+csv', is designed to lead users to potentially harmful content. The presence of a large number of PDF links suggests a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness.

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=c+export+to+csv
    • http://files.amateursubiepros.com/uploads/1/3/2/7/132740278/bigajo-tokez.pdf
    • http://files.asianwoklondon.com/uploads/1/3/0/7/130739288/a7cd4944fd67839.pdf
    • http://files.picsandwics.com/uploads/1/3/1/8/131856071/zexeselalopopipizij.pdf
    • http://files.freeyourmindaz.com/uploads/1/3/2/6/132681229/zukepadinate_biteraxegume.pdf
    • http://files.wrecklessericpaintings.com/uploads/1/3/1/4/131406892/fopiga-zijifuvizewaweb-tutomunaxev-nilofikilovemi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/5356/2526/files/58805906483.pdf
    • https://cdn.shopify.com/s/files/1/0434/5993/6421/files/benenelibufulabupulaguses.pdf
    • https://cdn.shopify.com/s/files/1/0434/9794/7288/files/wimone.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/woburorofinuxup.pdf
    • https://cdn.shopify.com/s/files/1/0430/1812/5465/files/marenejuta.pdf
    • https://cdn.shopify.com/s/files/1/0429/1336/6182/files/69909235499.pdf
    • https://cdn.shopify.com/s/files/1/0430/6921/0773/files/76264678100.pdf
    • https://cdn.shopify.com/s/files/1/0440/7102/6853/files/455204701.pdf
    • https://cdn.shopify.com/s/files/1/0430/9316/4181/files/19426738645.pdf
    • https://cdn.shopify.com/s/files/1/0436/4645/1862/files/11494882006.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12319118289.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/64320519605.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/54275996466.pdf
    • https://cdn.shopify.com/s/files/1/0430/7025/9357/files/32161344247.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e62.bin
0a51388581a83c89f02d321ab3f70d80f5df2e267f93895ff91cecb3797ee22a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E62 4716 bytes
font_01_sfnt_off00007e7f.bin
2d1c02d7faeb7dad5af5d103f135926a0d4fd4e69f3a7da8959d46cf8e88466d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E7F 3120 bytes
font_02_sfnt_off00008b02.bin
271cfabfb580cccf4b400581c80a2caff9c5e964df88deef0304dc7a11998d66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B02 13776 bytes

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