Malicious PDF — malware analysis report

Static analysis result for SHA-256 d62a616439ad1cff…

MALICIOUS

PDF

39.5 KB Created: 2020-10-04 00:33:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 25ded7c7e931b53268ef6101bf894045 SHA-1: 161dda3929963c89146e6ba8793a48e3d109712a SHA-256: d62a616439ad1cff2a8c99316a7fe908afbe02573a815c56cb85633dc01442bd
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector found in the heuristics. This suggests the PDF is designed to redirect users to malicious sites, likely for phishing or to download further malware.

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://ggtraff.ru/pify?keyword=oae+secrets+study+guide In PDF document text
    • https://site-1036685.mozfiles.com/files/1036685/fenenurufodumitug.pdfIn PDF document text
    • https://site-1036932.mozfiles.com/files/1036932/lunilaruli.pdfIn PDF document text
    • https://site-1037163.mozfiles.com/files/1037163/96245260348.pdfIn PDF document text
    • https://site-1036671.mozfiles.com/files/1036671/36593512353.pdfIn PDF document text
    • http://sesiwozad.acornoakphoto.com/uploads/1/3/0/9/130969114/dufilo-gifixewamowur-kipuwoseretas-vokunimope.pdfIn PDF document text
    • http://files.usbmnla.com/uploads/1/3/1/4/131438007/7525669.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/1/0428/7925/4694/files/atomic_and_molecular_structure_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/1793/2437/files/cinema_4d_r16_full_crack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3123/1655/files/citing_a_book_bluebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2888/1318/files/foreign_country_that_starts_with_x.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1582/3772/files/bajizojobivipi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6291/0872/files/dalulove.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5979/2022/files/battle_of_myeongnyang_documentary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0160/8353/files/maze_runner_newt_x_reader.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_off00005cfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CFE 5204 bytes
SHA-256: fc8bbd8e758693fae471d0eca845c1fb95547a860aab410f0f8d774f0b51dc19
font_01_sfnt_off00006ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC5 10008 bytes
SHA-256: fd96b7f2ff86b3276526691b6104859531e3b310fa1d6650ce3fd5bf4f43b004

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