Malicious PDF — malware analysis report

Static analysis result for SHA-256 195ffc7521475fa6…

MALICIOUS

PDF

49.8 KB Created: 2020-08-11 18:11:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35905a4b1708c31edfbd288ba3fc4dbb SHA-1: 1934da21eeb8e6f602ae24580753802cd0ecd9fc SHA-256: 195ffc7521475fa64616c79040df65e89934df93131f0e1532955e3aeb495191
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector (ttraff.cc). The document body, though heavily obfuscated, includes the same URL, suggesting an attempt to direct users to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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=presentation+of+data+pdf
    • http://files.sharihuntphotography.com/uploads/1/3/0/7/130740112/kunagezosal_kovixufupurodid.pdf
    • http://tulisafoj.scituatefoodpantry.org/uploads/1/3/1/4/131438667/ruxipeli-nufetu-lerivakemopu-nexofuw.pdf
    • http://files.sambacostumeparis.com/uploads/1/3/1/4/131453214/walinaje_wesutalopulezin.pdf
    • http://files.inmathclass.com/uploads/1/3/1/3/131380786/pedusidulosu-rawikitagude.pdf
    • http://files.bonniejanedesign.com/uploads/1/3/1/4/131437454/fejizudup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4553/5400/files/malaysian_anti_corruption_act.pdf
    • https://cdn.shopify.com/s/files/1/0433/9426/9333/files/rutilito.pdf
    • https://cdn.shopify.com/s/files/1/0435/5453/7624/files/71560271357.pdf
    • https://cdn.shopify.com/s/files/1/0435/7108/5475/files/bitosibuzowinerukavef.pdf
    • https://cdn.shopify.com/s/files/1/0432/2823/3885/files/jibavisutami.pdf
    • https://cdn.shopify.com/s/files/1/0434/1520/8098/files/grammar_diagnostic_test.pdf
    • https://cdn.shopify.com/s/files/1/0437/8748/5342/files/orchitis_pada_anak.pdf
    • https://cdn.shopify.com/s/files/1/0429/0304/4263/files/60711158176.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/somefolepedenajedozozafa.pdf
    • https://cdn.shopify.com/s/files/1/0434/6504/8214/files/nazab.pdf
    • https://cdn.shopify.com/s/files/1/0448/6764/9698/files/convert_corel_file_to_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/6059/1776/files/mubojagokaxa.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_off0000851c.bin
577acc4748c4535136f0b64c69eb237e8768575c36c1abc732f4d72bb6d2641d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x851C 5004 bytes
font_01_sfnt_off00009624.bin
5557336de065b2897bd8dbd9460d82429b003ecc7e79f3a96cf74c501fc233f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9624 10472 bytes

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