Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d233c72b52815e…

MALICIOUS

PDF

47.9 KB Created: 2020-08-28 07:41:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0c93d0e10c27d2e5ea0b7aa7b09dbc6 SHA-1: 85e7c2470aae683ba75b4df77a0ee85f1b155f11 SHA-256: 02d233c72b52815ea74ba9faf5cac2475f714968f2e883815ce07bb53c77edc9
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, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure, indicating a malicious intent to lead users to harmful sites. The ML classifier also strongly flagged this PDF as malicious.

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=dulhe+ka+sehra+suhana+lagta+hai+mp4
    • http://lugujepot.circlemstudio.net/uploads/1/3/1/4/131482853/xibulubibew.pdf
    • http://files.alexklein.net/uploads/1/3/0/9/130969845/rixikul-jaduzitufubuw.pdf
    • http://files.castaicbassclub.org/uploads/1/3/1/4/131483034/e454b343.pdf
    • http://files.portageresourceguide.com/uploads/1/3/1/6/131606644/8719065.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9809/6284/files/cancionero_guitarra_rock.pdf
    • https://cdn.shopify.com/s/files/1/0431/1983/7333/files/94192841406.pdf
    • https://cdn.shopify.com/s/files/1/0430/2218/8701/files/water_1_egg_group.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30740110423.pdf
    • https://cdn.shopify.com/s/files/1/0438/2697/0786/files/exploring_biology_in_the_laboratory.pdf
    • https://cdn.shopify.com/s/files/1/0431/6905/4886/files/advanced_excel_2020_books.pdf
    • https://cdn.shopify.com/s/files/1/0427/4018/7303/files/zetulisirazituman.pdf
    • https://cdn.shopify.com/s/files/1/0432/7754/9728/files/55261375628.pdf
    • https://cdn.shopify.com/s/files/1/0437/2663/5157/files/zaxiteperujunebisip.pdf
    • https://cdn.shopify.com/s/files/1/0439/1596/8667/files/kisamox.pdf
    • https://cdn.shopify.com/s/files/1/0428/9937/4233/files/argumentos_a_favor_de_la_pena_de_muerte.pdf
    • https://cdn.shopify.com/s/files/1/0438/0455/7472/files/refojasubumodom.pdf
    • https://cdn.shopify.com/s/files/1/0433/8306/2678/files/interview_tips_books.pdf
    • https://cdn.shopify.com/s/files/1/0433/4305/2953/files/62060839416.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004efe.bin
3774860f4030b3774ad4b55a6a89000d3b6919ae649f3f94a84c277c1cc6ca13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EFE 5384 bytes
font_01_sfnt_off00006126.bin
d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6126 3720 bytes
font_02_sfnt_off00006c89.bin
ab040e6a192b77abee7e46d1bfc2c4aada98c7b750aeba2b67aec4a4a159c183		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C89 10312 bytes
font_03_sfnt_off00008ffd.bin
4166d31f132b9747bb24ff0df8792dd5beedb80a791b074a8d70a1b2d2024670		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FFD 19896 bytes

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