Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b761d464e085269…

MALICIOUS

PDF

45.8 KB Created: 2020-08-07 21:05:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82a48f645f6c7c0718ee65647ea52fdb SHA-1: c57cde624cb52d0070cf6be618cfc3614f7dcd85 SHA-256: 6b761d464e085269c7bc46a31579451c4c7ef7472409dc93f9fc99522f420af8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to a redirector service. The primary link, 'https://ttraff.cc/pify?keyword=handbook+of+qualitative+data+analysis+pdf', is a known malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, and the document body is heavily obfuscated.

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=handbook+of+qualitative+data+analysis+pdf
    • http://jonus.deafactive.org/uploads/1/3/1/3/131398360/2614246.pdf
    • http://files.johnandmargaret1607.com/uploads/1/3/2/6/132681579/xolupazaluwuzabubi.pdf
    • http://files.goldbergacademy.org/uploads/1/3/0/7/130739856/wekijazalo.pdf
    • http://files.riinalaineartist.com/uploads/1/3/1/4/131453588/pirum.pdf
    • http://files.awaveofhealthymeals.com/uploads/1/3/0/7/130776208/zavopatafo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/bikoberonotizodulezokol.pdf
    • https://cdn.shopify.com/s/files/1/0440/9946/9464/files/37716596031.pdf
    • https://cdn.shopify.com/s/files/1/0433/4547/7783/files/84343673326.pdf
    • https://cdn.shopify.com/s/files/1/0432/7342/0965/files/2733148701.pdf
    • https://cdn.shopify.com/s/files/1/0437/6962/6781/files/mavuw.pdf
    • https://cdn.shopify.com/s/files/1/0439/6895/4526/files/nusakumelewobadadotegovo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sasexenumufuxa.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/schedule_c_form_1040.pdf
    • https://cdn.shopify.com/s/files/1/0438/9994/5112/files/skyrim_dual_wield_mod.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lorirazapevimixawas.pdf
    • https://cdn.shopify.com/s/files/1/0434/1714/1415/files/22669088479.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_off000075ab.bin
5388bcc191d4bc29a3925db0237b77bf9de526d60e2d09ed58574ab928cd636b
pdf-font-stream PDF embedded font (sfnt) at offset 0x75AB 5392 bytes
font_01_sfnt_off0000881e.bin
9b433dd99c9045dc4d8ecc0d0f5676769a903990c742e3981e70a410d873c4ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x881E 9876 bytes