Malicious PDF — malware analysis report

Static analysis result for SHA-256 0702e6b93c34373f…

MALICIOUS

PDF

61.8 KB Created: 2020-08-25 03:56:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d7c23a5f6391b0f5ae53ba863c5765d SHA-1: 8becbe98e0691f9da200e4e9eeb77ed657ae7e00 SHA-256: 0702e6b93c34373f857fbccc176f060ad00e1bfaaef0a0a889fdab3784b5acad
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 a redirector service. The primary malicious link, 'https://ttraff.com/pify?keyword=gba+emulator+pc++unblocked', is designed to lead users to potentially harmful content. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to obscure the true destination or engage in SEO poisoning tactics.

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=gba+emulator+pc++unblocked
    • http://files.dnrcustoms.com/uploads/1/3/1/3/131379894/rutus.pdf
    • http://files.vippartytokyo.com/uploads/1/3/1/4/131437987/1377046.pdf
    • http://madod.misscheviouscrystals.com.au/uploads/1/3/2/6/132682646/1401078.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0450/3502/8630/files/adenovirus_enterico.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56773010908.pdf
    • https://cdn.shopify.com/s/files/1/0436/2321/9363/files/misplaced_and_dangling_modifiers_exercise_5_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/motilufukatamerilepu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7996/6628/files/71486888149.pdf
    • https://cdn.shopify.com/s/files/1/0431/0728/7206/files/nelife.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/objective_c_tutorial_point.pdf
    • https://cdn.shopify.com/s/files/1/0438/9906/0376/files/bejetasitufi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/html_footer_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/3106/7813/files/8443470012.pdf
    • https://cdn.shopify.com/s/files/1/0429/8620/9439/files/android_java_convert_boolean_to_string.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_off0000a4b5.bin
0c5e8afa225331ee3f4f338fba349bd50793fa18c27c4eae94011778353ec5aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4B5 4240 bytes
font_01_sfnt_off0000b355.bin
6b48ab69c5a65799748ff3ef9c186f7a0b53e117426adccaaadcb36409798ebf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB355 5276 bytes
font_02_sfnt_off0000c535.bin
bf953cbeee2a4823accb7bf1b6f09210aca60a25e082166446aeec37f4e86064		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC535 10772 bytes

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