Malicious PDF — malware analysis report

Static analysis result for SHA-256 6db84e5d89895fc5…

MALICIOUS

PDF

46.2 KB Created: 2020-08-11 01:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b4baaae27f5721d7bcd1493ebf797db SHA-1: e0747ef048094b9edb9240e704a8fb146a99e7ca SHA-256: 6db84e5d89895fc59d1b1654159321defd86f65bd6ccd80a0aab84732978c460
154 Risk Score

Malware Insights

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

This PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the URL https://ttraff.cc/pify?keyword=mh+cet+2020+result+pdf+download. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users into clicking it under the guise of a 'result download'. The presence of numerous external PDF links further supports the classification as a malicious redirector.

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=mh+cet+2020+result+pdf+download
    • http://files.snugwicks.com/uploads/1/3/1/6/131606397/loraxejubiboni.pdf
    • http://ruzuriz.nashvilleautismservices.com/uploads/1/3/1/4/131407406/61007.pdf
    • http://files.chyarber.com/uploads/1/3/2/7/132740181/vigile_rejisimosegu.pdf
    • http://files.ifugao-archaeological-project.org/uploads/1/3/1/0/131070072/botaluti.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3193/6674/files/20070946256.pdf
    • https://cdn.shopify.com/s/files/1/0433/6815/3253/files/mac_os_9.pdf
    • https://cdn.shopify.com/s/files/1/0435/1423/2984/files/61496140060.pdf
    • https://cdn.shopify.com/s/files/1/0439/1718/1083/files/1363801956.pdf
    • https://cdn.shopify.com/s/files/1/0436/4229/0336/files/gatowogukawukilel.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/bodubor.pdf
    • https://cdn.shopify.com/s/files/1/0432/6886/6208/files/android_games_hacking_tools.pdf
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/84944697613.pdf
    • https://cdn.shopify.com/s/files/1/0433/5747/0872/files/go_cruise_throttle_lock.pdf
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/bavarugili.pdf
    • https://cdn.shopify.com/s/files/1/0433/4583/8232/files/78196465814.pdf
    • https://cdn.shopify.com/s/files/1/0437/1503/5291/files/cat_bullet_king_throne.pdf
    • https://cdn.shopify.com/s/files/1/0432/0601/7185/files/989107536.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35117459625.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b71.bin
5e9de15027db832a6ed920b9ff9021ee6e3290c4aa4faec5239ec3c7d3701b91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B71 5616 bytes
font_01_sfnt_off00007ea2.bin
9e771591a90bcf79505c9e735e04cfec901eae05366ab4c7c346865188a1119d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA2 14576 bytes

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