Malicious PDF — malware analysis report

Static analysis result for SHA-256 1567a7b830481e3b…

MALICIOUS

PDF

47.0 KB Created: 2020-08-08 06:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 414e1e06daeb1363e853b3ee8afbb2d5 SHA-1: 135ba78efb27dc8631b858bf0f63eb169cb5f0d6 SHA-256: 1567a7b830481e3b3440592a9545e77b28b8e270779b5379dcf682b74bff2a43
154 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious infrastructure, indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=poultry+diseases+and+their+treatment+in+urdu+pdf, suggesting a lure to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

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=poultry+diseases+and+their+treatment+in+urdu+pdf
    • http://files.topdogracing.com/uploads/1/3/2/8/132815123/9c36bc.pdf
    • http://files.hornsbyptsa.org/uploads/1/3/1/3/131379434/bomujakurufilo.pdf
    • http://files.highcountrycorals.com/uploads/1/3/1/3/131398479/9768051.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/7618/2426/files/kasivovomifafuwu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8268/6367/files/free_bass_guitar_lessons_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8242/files/20204789541.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8822/files/multivariable_calculus_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/3253/4422/files/radogupi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8325/9285/files/artist_management_manual_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6343/files/japaxazijovaze.pdf
    • https://cdn.shopify.com/s/files/1/0431/5679/9647/files/6001581028.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pejodogidevetakuranuwa.pdf
    • https://cdn.shopify.com/s/files/1/0438/8506/8456/files/burelumuramo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/tategakenu.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_off00007aba.bin
2f81f574cae8af075a7a37f777182aa0dc74616e9e36f739d4f2eec30cb6e728
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABA 5384 bytes
font_01_sfnt_off00008ce5.bin
61bd16dc5b25b6bdf27bdfb3ba5afd9527d5675e7912252907c082685da9a1f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE5 9900 bytes