Malicious PDF — malware analysis report

Static analysis result for SHA-256 ced3477b9fbe7d12…

MALICIOUS

PDF

37.3 KB Created: 2020-08-20 15:32:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: dbe6e58d823a43f38a82e07236e722d2 SHA-1: b11ad4e2f0c5d356c98bfa9cdf376cbd9f52f888 SHA-256: ced3477b9fbe7d12a32519c1c8d3e1941e2f614753f23ddb4deb6a89adfd33cf
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 redirector service known for malicious activity. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring the user to click on these links, likely leading to further malicious content or downloads.

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=banoongi+main+hafiz+quran+audio In PDF document text
    • http://files.snowyoming.org/uploads/1/3/1/4/131482887/wogariletof-najuwozululudi.pdfIn PDF document text
    • http://files.praesidia-alliance.com/uploads/1/3/1/4/131406662/xutikamofav-gotejogikages.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9100/8419/files/gumiparibizofalunizen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9765/1352/files/92302933772.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/45848359125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54341666742.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5419/3057/files/accounting_theory_research_regulation_and_accounting_practice.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2732/3301/files/56661970538.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3032/3101/files/zaxuloretofizim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2190/0696/files/63621129528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6497/4742/files/vuroxuwofujopaxogosipuja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/7888/5032/files/tiwapa.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B31 5336 bytes
SHA-256: 5512ddc882ca7c75eb98350f6ef896d93f1681b86206f1876f69f282d734312b
font_01_sfnt_off00005d28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D28 13728 bytes
SHA-256: 64a1cfd81b4e4dbefbc71709cf195eb33ee1bf057402985055cb7d5b52c71a4f

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