Malicious PDF — malware analysis report

Static analysis result for SHA-256 79bfc2bf2b06717b…

MALICIOUS

PDF

42.8 KB Created: 2020-08-24 05:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9089f5ef2629ad9c23dd3a552ae132f2 SHA-1: 2e62575db3fb8cc57a069e5eaae575f8eadec83a SHA-256: 79bfc2bf2b06717b36e3aa1b5996e020f3f0c0281017c910a4e9fd18c5186621
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a 'police report' and includes the malicious URL, suggesting a social engineering lure. The presence of numerous external links also points to a link farm, a common tactic for distributing malware or phishing content.

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=police+report+bangkok
    • http://memizabe.aaresi.com/uploads/1/3/1/3/131398539/basurixoj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5945/3860/files/57024298243.pdf
    • https://cdn.shopify.com/s/files/1/0438/0449/1936/files/website_als_speichern_chrome.pdf
    • https://cdn.shopify.com/s/files/1/0438/2212/1122/files/20696989967.pdf
    • https://cdn.shopify.com/s/files/1/0437/4354/3447/files/everything_is_figureoutable_marie_forleo.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/ludoron.pdf
    • https://cdn.shopify.com/s/files/1/0428/8829/8659/files/fodofunoxejorida.pdf
    • https://cdn.shopify.com/s/files/1/0447/6082/6007/files/cmake_tutorial_c.pdf
    • https://cdn.shopify.com/s/files/1/0433/7664/0156/files/vemuxotujazufufaz.pdf
    • https://cdn.shopify.com/s/files/1/0462/2870/1338/files/tiny_archers_mod_apk_android_1.pdf
    • https://cdn.shopify.com/s/files/1/0432/2145/0914/files/cambridge_english_pronouncing_dictionary_17th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7974/files/tuzasene.pdf
    • https://cdn.shopify.com/s/files/1/0440/1519/0181/files/93415761702.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5268/files/27605021852.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_off000069d0.bin
17d8d38820797e5bf93322594974dc0090d70f93be9f112d1ffd7e294637bf86
pdf-font-stream PDF embedded font (sfnt) at offset 0x69D0 5128 bytes
font_01_sfnt_off00007b4e.bin
458374bd9f854893eb85e064a5b5bc2c9f6662512d4f9653be6d7c90d528cdc8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B4E 10412 bytes