Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b7a9c4f6e3916ee…

MALICIOUS

PDF

40.1 KB Created: 2020-08-20 21:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6c8f5842abd2db291e851828ca6b4e1 SHA-1: 085a70092137729eb4e3b4d63f29df863994bbe4 SHA-256: 6b7a9c4f6e3916ee532b48d529115e5a6c3653593a201b4f6630fb7f24f3d99f
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. The link leads to 'https://ttraff.ru/pify?keyword=weather+report+of+chanho+ranchi', suggesting a phishing or scam attempt. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, some of which are hosted on potentially untrusted domains. No scripts were extracted, but the presence of malicious links indicates an attempt to redirect the user to a harmful site.

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.ru/pify?keyword=weather+report+of+chanho+ranchi
    • http://files.norcrosstrack.com/uploads/1/3/1/3/131379117/dfdb9ccb7.pdf
    • http://fowolora.gailgloverfaust.org/uploads/1/3/1/4/131453119/jemav.pdf
    • http://files.gtmgc.org/uploads/1/3/0/7/130739379/3751084.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3914/6662/files/57956807402.pdf
    • https://cdn.shopify.com/s/files/1/0432/2908/5859/files/ditusuzijizalevati.pdf
    • https://cdn.shopify.com/s/files/1/0435/8098/1403/files/ascomycete_fungi_of_north_america_a_mushroom_reference_guide.pdf
    • https://cdn.shopify.com/s/files/1/0436/9989/6475/files/vifivexizaxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2269/6098/files/integral_calculus_by_shanti_narayan.pdf
    • https://cdn.shopify.com/s/files/1/0440/2718/3269/files/39400523610.pdf
    • https://cdn.shopify.com/s/files/1/0435/2439/1071/files/gowun.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/80080918373.pdf
    • https://cdn.shopify.com/s/files/1/0435/2439/1067/files/37017860840.pdf
    • https://cdn.shopify.com/s/files/1/0438/1681/2706/files/tuffcuff_jr.pdf
    • https://cdn.shopify.com/s/files/1/0437/6444/9437/files/hp_dv7_driver.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_off00005fa6.bin
36b8f7f2ee3cd2798b55036a04a523271d6afdc640fed63cbae0685d5a9c2a27
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA6 4908 bytes
font_01_sfnt_off00007065.bin
53b8afcaf41921eaa9036566293c8a88714aabd0f191a19c20d1f20b9035de63
pdf-font-stream PDF embedded font (sfnt) at offset 0x7065 10252 bytes