Malicious PDF — malware analysis report

Static analysis result for SHA-256 76088629376c20d6…

MALICIOUS

PDF

44.5 KB Created: 2020-08-14 12:55:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5be1e1682a47a7a00d423f1d8d3713cf SHA-1: 0e25469a9e0dbea54e3d13a3b6d560acaa0e0905 SHA-256: 76088629376c20d6fcebb867279630294ae1ceeeb34282e371b9dc1a353183e7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to suspicious domains or known redirectors. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a link to 'ttraff.cc' as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into visiting malicious sites, 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.cc/pify?keyword=adobe+acrobat+pdf+reader+free++mac
    • http://lalut.petalumamarinabusinesscenter.com/uploads/1/3/1/4/131483025/gozulaxozije_jupifijitamunug.pdf
    • http://files.salondiversions.com/uploads/1/3/2/7/132710783/3cdb75946a5f2.pdf
    • http://kukeveb.secondstagehousing.net/uploads/1/3/0/8/130814238/torafatemifude.pdf
    • http://files.missymoreno.com/uploads/1/3/2/6/132695525/e2d57ab82cbc.pdf
    • http://files.storytellerskgregory.com/uploads/1/3/2/7/132740435/15f267.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/luzizagegowi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8055/5419/files/noroxixejofozofig.pdf
    • https://cdn.shopify.com/s/files/1/0437/9122/0887/files/69892734805.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6521/files/tirerolamuledajar.pdf
    • https://cdn.shopify.com/s/files/1/0439/5555/2414/files/non_mendelian_genetics_multiple_choice_questions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9688/3868/files/67438738386.pdf
    • https://cdn.shopify.com/s/files/1/0427/9389/4044/files/81474091866.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/94677122942.pdf
    • https://cdn.shopify.com/s/files/1/0434/0691/7799/files/modo_marbel_cheat.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/25582384252.pdf
    • https://cdn.shopify.com/s/files/1/0430/4823/9257/files/diduwurufawitosuzabow.pdf
    • https://cdn.shopify.com/s/files/1/0431/7688/6431/files/bugarabujupobajejutim.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_off00006e6b.bin
3b90dbf35b21a667d7ddb691ec646e3230f56da042ebd57f133457c40d65d31c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6B 5220 bytes
font_01_sfnt_off00008018.bin
7476f72f2b34169798369b492c3adf8c1910c351aa70280e6d46f59fa5d4c667		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8018 10736 bytes

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