Malicious PDF — malware analysis report

Static analysis result for SHA-256 032d28f3cc4c7914…

MALICIOUS

PDF

43.2 KB Created: 2020-08-20 05:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 975ccc2eea95489bd68583d4e784f66b SHA-1: 425dd3fc24f42ad373b8158399f95e4dfb1b4580 SHA-256: 032d28f3cc4c7914d02fc34a0d499d014e67f17b3689c05ab30e36ca9811f1d3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. This suggests an attempt to trick users into clicking malicious links, likely leading to further malware or phishing.

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=chapter+5+review+congruent+triangles+answer+key
    • http://files.niwotptac.com/uploads/1/3/2/3/132302768/8803648.pdf
    • http://files.areaokc.com/uploads/1/3/2/3/132303024/6203709.pdf
    • http://files.rainshadowdrents.com/uploads/1/3/1/4/131453733/3381595.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9151/5805/files/swot_analysis_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0440/3675/1525/files/gate_mathematics_calculus.pdf
    • https://cdn.shopify.com/s/files/1/0435/6535/1073/files/sikedap.pdf
    • https://cdn.shopify.com/s/files/1/0434/0711/4391/files/firirivova.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40169505762.pdf
    • https://cdn.shopify.com/s/files/1/0432/6939/0500/files/ntr_biopic_songs_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7327/2998/files/63181558936.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tivaluzisezulumavolo.pdf
    • https://cdn.shopify.com/s/files/1/0447/8540/2013/files/anlise_qualitativa_de_dados.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7006/files/28874457214.pdf
    • https://cdn.shopify.com/s/files/1/0438/4571/4077/files/wonifuwagigagifuvu.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_off0000694e.bin
4a033a40b0cde1af2ed1f08a578796b8e0514afdddd83374d0c03224de46d405
pdf-font-stream PDF embedded font (sfnt) at offset 0x694E 5544 bytes
font_01_sfnt_off00007c44.bin
99def16326a643246d30bb07786adefdbb030a6bc6d998558105f776ced7c3d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C44 10408 bytes