Malicious PDF — malware analysis report

Static analysis result for SHA-256 70207f5929592723…

MALICIOUS

PDF

41.6 KB Created: 2020-07-09 19:39:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 934ed289a772805c2c2f360a7101e5b7 SHA-1: 568be49b0957db94dfd9c5394494976cd0a49556 SHA-256: 70207f5929592723f94d61abc6771e217cb6d74c921823bc7971850faa1b8208
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or redirection scheme. One critical heuristic identified a link to a known malicious redirector, and the ML classifier strongly indicated maliciousness. The embedded URLs are likely used to direct users to malicious content or phishing sites.

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/wb?keyword=traffic%20jam%20game%20pdf
    • http://files.dunphyshandguntraining.com/uploads/1/3/2/6/132681566/d354c601d.pdf
    • http://files.brianskahn.com/uploads/1/3/2/6/132681030/104182.pdf
    • http://files.studiotalyne.com/uploads/1/3/2/6/132681938/2202113.pdf
    • http://files.threeaineconsultancy.com/uploads/1/3/1/0/131070125/587526f65.pdf
    • http://files.letspaintarabic.com/uploads/1/3/1/3/131379612/22ab9b14a11.pdf
    • http://files.poehaku.com/uploads/1/3/1/6/131607239/ab7f23f.pdf
    • http://files.mountzionpbchurch.org/uploads/1/3/1/4/131406202/1485008.pdf
    • http://files.saundersvet.com/uploads/1/3/1/3/131383661/4974721.pdf
    • http://files.veledathorssonphotography.com/uploads/1/3/2/8/132815004/lipuf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://dezekifas.files.wordpress.com/2020/07/14726302648.pdf
    • https://sovibabe.files.wordpress.com/2020/06/69314346921.pdf
    • https://mameloga.files.wordpress.com/2020/06/folulawakevudobitir.pdf
    • https://pezelid.files.wordpress.com/2020/07/tugipemawubo.pdf
    • https://wikunakes.files.wordpress.com/2020/07/zonadej.pdf
    • https://verakiwij.files.wordpress.com/2020/06/90151539163.pdf
    • https://lugolasef.files.wordpress.com/2020/06/95392823229.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/matam.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mobisibat.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/88075317933.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12035000993.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexanenivoxepabulolud.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_off0000657b.bin
e564e2fbc5e14a9843b7500922acc17b313eecd1258e42ec8a09f21fd6cb08e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x657B 4784 bytes
font_01_sfnt_off000075b6.bin
4f94318a46b41c542d65d99b43a27c31a77a7402335efbad91f4c7849e136ca0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75B6 10552 bytes

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