Malicious PDF — malware analysis report

Static analysis result for SHA-256 df29921ad13e122e…

MALICIOUS

PDF

58.7 KB Created: 2020-08-20 09:53:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc89f2c12ff26997df09637fb28df47f SHA-1: 808d090fab4b019779b247b4a6f8e63a0f99aa2e SHA-256: df29921ad13e122e15b7a6ecec6f4571811f8a8d1cf129b47c8207d8b26dc892
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to a redirector service (ttraff.com) which is known to host malicious content. The document body itself is heavily obfuscated but appears to contain the same redirector URL and a large number of benign-looking Shopify URLs, suggesting a link farm designed to obscure the malicious destination. The ML classifier also 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.com/pify?keyword=odisha+song++2017
    • http://files.intuitons.org/uploads/1/3/2/6/132696111/1a1d9a507f24a.pdf
    • http://fubose.coasttocoasthauoratrust.com/uploads/1/3/0/7/130775505/ketenutiwazetona.pdf
    • http://goxeriku.sailcnce.eu/uploads/1/3/2/7/132740649/9c57d108cec.pdf
    • http://files.kol-tzedek.org/uploads/1/3/1/4/131438453/2997a5d.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/53205426529.pdf
    • https://cdn.shopify.com/s/files/1/0432/7496/1059/files/95852557897.pdf
    • https://cdn.shopify.com/s/files/1/0437/0202/6393/files/lowiwanapuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/3262/4797/files/fotonazugesi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0712/3357/files/42454448800.pdf
    • https://cdn.shopify.com/s/files/1/0432/8567/6192/files/kepokakeketak.pdf
    • https://cdn.shopify.com/s/files/1/0429/9443/4202/files/50637672223.pdf
    • https://cdn.shopify.com/s/files/1/0428/7732/1379/files/4299746866.pdf
    • https://cdn.shopify.com/s/files/1/0427/3248/6823/files/windows_me_iso.pdf
    • https://cdn.shopify.com/s/files/1/0429/3830/2627/files/tulexurimi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2502/2621/files/kekimuzigufugetuti.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3912/files/77104447720.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7696/files/seratunigemolufofo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6033/8586/files/lokivomoxot.pdf
    • https://cdn.shopify.com/s/files/1/0437/5671/6183/files/7154665595.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000655f.bin
2b2a16ec95b043622f64913ea5673c9e9191dfda1a052dd224ac6b098253b3db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x655F 4980 bytes
font_01_sfnt_off0000763c.bin
d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280		 pdf-font-stream PDF embedded font (sfnt) at offset 0x763C 3720 bytes
font_02_sfnt_off00008197.bin
f1f02d88343e922b5a9114fc5b40c64f737d9eeecc86a60780fe1efdc19ec0e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8197 4856 bytes
font_03_sfnt_off00008ec0.bin
961ef5abad1d12a3496e0bac5d4fd4f7e6b9f0a8fc1a9066f2d73d01358b0271		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC0 10488 bytes
font_04_sfnt_off0000b261.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB261 4324 bytes
font_05_sfnt_off0000c05c.bin
c292acc4dcaef387475db37bcd1c8cfe335c4a8b52623c685dc5a4c61a4ad3d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC05C 8036 bytes

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