Malicious PDF — malware analysis report

Static analysis result for SHA-256 08644fafafbfb037…

MALICIOUS

PDF

46.2 KB Created: 2020-08-30 14:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a96a2e1b9bd9ef7335d0349de806d63 SHA-1: 05f765ef28e854757dc204f4441dfc7d4d7eef49 SHA-256: 08644fafafbfb0371291f381399825fcfb41ae75a0fd980d5bef464da6972758
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, with one pointing to a known malicious redirector. The heuristic firings indicate the PDF is designed as a link farm, likely to distribute further malicious content or phish users. The ML classifier strongly supports the malicious nature of this PDF.

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/wix?keyword=dell+24+monitor+p2417h
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4540/4327/files/age_of_empires_2_installer.pdf
    • https://cdn.shopify.com/s/files/1/0432/2538/3073/files/saxon_algebra_1_2_online_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0463/4971/3569/files/muvadozapu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6948/0866/files/janukunijat.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nebedaxogatasimilore.pdf
    • https://cdn.shopify.com/s/files/1/0429/1782/2620/files/42248653222.pdf
    • https://cdn.shopify.com/s/files/1/0433/8784/6806/files/61780908009.pdf
    • https://cdn.shopify.com/s/files/1/0434/3077/2901/files/tufaroro.pdf
    • https://cdn.shopify.com/s/files/1/0429/3741/7891/files/26345187267.pdf
    • https://static.usrfiles.com/ugd/238140_5f1cb53ea96b4a95b227f6d76a785b8c.pdf
    • https://static.usrfiles.com/ugd/b8c837_cea0e7fddef34c329f71ace3b7fb39fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_df1eccf167f74f62aa404de7dda292d6.pdf
    • https://static.usrfiles.com/ugd/c4ccc4_7ac2150a112843a2a587ed983198e261.pdf
    • https://static.usrfiles.com/ugd/b8c837_211b042e00ef4f7db3cbe1061efb60dd.pdf
    • https://cdn.shopify.com/s/files/1/0435/6869/3407/files/pray_believing_god_will_answer.pdf
    • https://cdn.shopify.com/s/files/1/0435/8258/7039/files/11_luciferian_points_of_power.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_off00006c1f.bin
b99f2583dc52590cedaf01d0d6e50797ad13bbe7820462970e61e682af82dd55
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C1F 5020 bytes
font_01_sfnt_off00007d1e.bin
37bfd85ad374245c682d3faa03fce99bfc81bcfcc05f3683cdc3cf5d3d93fc1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D1E 15304 bytes