Malicious PDF — malware analysis report

Static analysis result for SHA-256 128b6714c783c619…

MALICIOUS

PDF

45.7 KB Created: 2020-08-28 03:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 673705949e74a7e34e0dabcf080650bd SHA-1: e903a7e5c036944e02a62c6eae798b6c4da63e6b SHA-256: 128b6714c783c619ec9312be32bd0ec99569548450338d44d5fd381bd473686f
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link to ttraff.com, indicating a malicious intent to redirect users. The ML classifier also strongly flagged this PDF as malicious. Although no scripts were explicitly extracted, the presence of embedded URLs and the PDF structure suggest it's designed to lure users to malicious infrastructure, likely for phishing or malware distribution.

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=electron+configuration+practice+work
    • http://files.thejoyofsyntax.com/uploads/1/3/1/8/131860204/310485.pdf
    • http://files.mtdistrictcc.com/uploads/1/3/1/4/131406222/1372901.pdf
    • http://lajalo.ourladyoflourdesharrisonville.org/uploads/1/3/0/7/130739240/zukera.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0446/0986/3843/files/binh_php_tn_t_dnh_cho_phi_p.pdf
    • https://cdn.shopify.com/s/files/1/0429/7601/8585/files/tail_call_optimization_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/jepake.pdf
    • https://cdn.shopify.com/s/files/1/0431/1220/2389/files/android_games_with_ps4_controller_support_2019.pdf
    • https://cdn.shopify.com/s/files/1/0435/3484/4059/files/free_porn_passwords.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/58937975299.pdf
    • https://cdn.shopify.com/s/files/1/0437/5665/0650/files/this_was_a_man_jeffrey_archer.pdf
    • https://cdn.shopify.com/s/files/1/0429/6491/0243/files/bojude.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/exploratory_data_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0431/5450/5882/files/43674355822.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ee5.bin
a40ef40d17c3c164721371dba63baf1d55e768c326e0d8a842c1b2b1d02ca681		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE5 5116 bytes
font_01_sfnt_off0000707b.bin
f70f02e262435ecf265a325844e1a8d73b567631d10513d1e713525641ebac68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x707B 10436 bytes
font_02_sfnt_off00009425.bin
135b61bc7a41198c29115aa914e1ed5c9eb5abf4e5d7d8c7271b2eeba2326a89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9425 16288 bytes

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