Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a220c1e9a37498…

MALICIOUS

PDF

49.3 KB Created: 2020-08-24 01:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b135fd506732f8feefde1e1700200693 SHA-1: 6c2eb023635850720e4e2330c722cb4f6fc4c12b SHA-256: 70a220c1e9a37498e9f10d0fe9048a06c1e99e1458e22164cbc76397881b2e6d
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 resources, suggesting a link farm or SEO manipulation tactic. One prominent URL, 'https://ttraff.cc/pify?keyword=galvanized+steel+sheet+uses', is flagged as a malicious redirector. The document body, though partially corrupted, contains text related to 'galvanized steel sheet uses' and includes the malicious URL, indicating a lure to a potentially harmful site.

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=galvanized+steel+sheet+uses
    • http://files.endofnovelty.com/uploads/1/3/0/8/130814118/6655576.pdf
    • http://files.firstchristianiowafalls.org/uploads/1/3/1/3/131381428/salug.pdf
    • http://files.henfieldcameraclub.net/uploads/1/3/1/4/131407635/bufoku_filadegakofu_risoxitiled_godepafujebata.pdf
    • http://files.rosannadiggs.com/uploads/1/3/1/3/131384401/8dc2b87de0751d.pdf
    • http://gaguxamep.fleurspressed.com/uploads/1/3/2/6/132696067/4703236.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/2545/7575/files/types_of_carotenoids.pdf
    • https://cdn.shopify.com/s/files/1/0432/7473/1685/files/roxavadari.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6885/files/the_analysis_of_biological_data_second_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/3417/1813/files/discord_code_block.pdf
    • https://cdn.shopify.com/s/files/1/0431/0089/7440/files/kaduwedokatigelalososuwej.pdf
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/vajev.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2941/files/zefolozesibogufatipop.pdf
    • https://cdn.shopify.com/s/files/1/0435/5837/1480/files/unr_crossfit_blog.pdf
    • https://cdn.shopify.com/s/files/1/0432/5654/5433/files/fesaruwowoxazot.pdf
    • https://cdn.shopify.com/s/files/1/0430/5564/4823/files/discord_name_font.pdf
    • https://cdn.shopify.com/s/files/1/0439/5030/9531/files/bicycle_thieves_2013_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/80112398018.pdf
    • https://cdn.shopify.com/s/files/1/0432/4599/4146/files/tasixokutagepiduvaso.pdf
    • https://cdn.shopify.com/s/files/1/0430/9568/7328/files/budget_planning.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_off00007764.bin
a5f23417bebd03d512bfc87b065c521b9a27ff4d7673f65e26013b0dd68e1b3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7764 4728 bytes
font_01_sfnt_off0000877c.bin
109b097ec5d4502ce3344ba173677dd43b28ecc0a859373da0704bdaa35d3d04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x877C 10156 bytes
font_02_sfnt_off0000aa24.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA24 4324 bytes

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