Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea616a784676388a…

MALICIOUS

PDF

58.1 KB Created: 2020-08-22 12:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3465e69373eb38c758de1ddb85632ac8 SHA-1: 46ff4e1db7c80d03a523095b3547c3a1d5d56f3a SHA-256: ea616a784676388a2547d0499fde781749200670b72c1d4fcce75abadd9ea8b4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. The primary malicious URL, 'https://ttraff.ru/pify?keyword=jogos+para+ppsspp++pelo+mega', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL and numerous other links pointing to Shopify and other domains, suggesting a large-scale link distribution effort. The ML classifier strongly supports the malicious verdict.

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.ru/pify?keyword=jogos+para+ppsspp++pelo+mega
    • http://nedogapex.trainingmadefair.com/uploads/1/3/0/7/130775388/vipubefutum.pdf
    • http://lagorul.nanlifinance.org/uploads/1/3/2/3/132303382/regugegenoxomemivafo.pdf
    • http://pigoverob.deirdrefolley.com/uploads/1/3/1/4/131407227/e6a4eb534f302.pdf
    • http://files.18crossroad.net/uploads/1/3/0/7/130740316/fifidimovuxetow_nezupevotedad.pdf
    • http://files.paulthiemann.com/uploads/1/3/2/6/132681026/b86cb.pdf
    • https://cdn.shopify.com/s/files/1/0432/8561/0654/files/berliner_platz_1_deutsch_im_alltag.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/89597609659.pdf
    • https://cdn.shopify.com/s/files/1/0436/1771/4338/files/stomp_kirk_franklin.pdf
    • https://cdn.shopify.com/s/files/1/0433/7706/6145/files/libro_cerebrito_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0433/3033/8966/files/apollo_100_joy.pdf
    • https://cdn.shopify.com/s/files/1/0436/8538/0246/files/usarec_form_967.pdf
    • https://cdn.shopify.com/s/files/1/0428/1335/8247/files/notopupil.pdf
    • https://cdn.shopify.com/s/files/1/0427/5961/8716/files/wejukuxawuvonoraxuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/4675/6774/files/mitudori.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5757/files/lugidevuwojabalezegewi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/livro_analise_sintatica.pdf
    • https://cdn.shopify.com/s/files/1/0432/7273/2836/files/donusel.pdf
    • https://cdn.shopify.com/s/files/1/0432/7132/3808/files/zijomagabug.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_off0000a172.bin
a624bcdf6fd51a76073aaea3bd2f69c0b2d0fef65b194fcc4ebbab70b831c3f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA172 5128 bytes
font_01_sfnt_off0000b2d0.bin
69128a7ec3966fe7ff89f13ca77041251021838ed7df9c14fb4e47893bbc0b6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2D0 13136 bytes

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