Malicious PDF — malware analysis report

Static analysis result for SHA-256 6676e8b93af39bac…

MALICIOUS

PDF

45.8 KB Created: 2020-08-12 21:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e9de57914c499ce0a87ff634877fdee SHA-1: 3feb12322ff44678343e7e585d621e4b5d0f9af3 SHA-256: 6676e8b93af39baca8c90e0f4eff6d74f31e360de0915a3ab85199aaa2d552b3
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify and other domains. One prominent link, 'https://ttraff.cc/wb?keyword=khalil%20gibran%20poems%20in%20malayalam%20pdf', is identified as a malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious infrastructure.

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/wb?keyword=khalil%20gibran%20poems%20in%20malayalam%20pdf
    • http://files.milissweetstogo.com/uploads/1/3/0/7/130739614/7984546.pdf
    • http://files.beaconforlife.com/uploads/1/3/0/7/130739945/92c73a7.pdf
    • http://files.jenkeyte.com/uploads/1/3/1/0/131070538/rolarumufud.pdf
    • http://files.carolineestabrooks.com/uploads/1/3/0/9/130969577/vadosifemamij-wodezerufud-pijawizaf-pukiwupuru.pdf
    • http://files.letscreatewithbonnie.com/uploads/1/3/0/8/130874647/eed4b31a4db1c58.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102Hussain
    • http://smc.org.inhttp://smc.org.in
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/70778272662.pdf
    • https://cdn.shopify.com/s/files/1/0432/1722/3840/files/51014037875.pdf
    • https://cdn.shopify.com/s/files/1/0432/6424/5925/files/rodakaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/74212439699.pdf
    • https://cdn.shopify.com/s/files/1/0436/3013/3406/files/watavotumutosusib.pdf
    • https://cdn.shopify.com/s/files/1/0436/6182/0054/files/92133628922.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/istanbul_metro_map_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/nugufidamavub.pdf
    • https://cdn.shopify.com/s/files/1/0437/7716/3416/files/sinojobetasomebugemoxigad.pdf
    • https://cdn.shopify.com/s/files/1/0432/2073/0020/files/togugimigo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1238/2117/files/73295159332.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
    • https://gitlab.com/smc/meera/blob/master/COPYING

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006933.bin
5f12fab33ed2fb9e8477f16dd2742277fc655fd6ed35b3ee61c84dce35cf68b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6933 5668 bytes
font_01_sfnt_off00007c46.bin
3fb936eacee6c49f80867a58e2cb26e4e89b4282b1c3ef9d8bce81e6499ffe51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C46 2836 bytes
font_02_sfnt_off0000878d.bin
a874c738abba49fa248a2c5d4e8a6a3a40d93c96fe20255da37031a99a6ed277		 pdf-font-stream PDF embedded font (sfnt) at offset 0x878D 10172 bytes

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