Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e0a3b0e19d5addd…

MALICIOUS

PDF

43.4 KB Created: 2020-09-05 22:28:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01bddec781cfda956dafc01431a4f7c0 SHA-1: 9a74c7b220ceb8f0d2264e9d6dcd9c1737fb717f SHA-256: 6e0a3b0e19d5addd26d56823406795b2b0b6dba339db0c74c359d60d3857e858
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent link directs to a known malicious redirector infrastructure, indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=august+2019+calendar+printable+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0450/3791/2214/files/online_aadhar_card_file_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/3351/8489/files/91692863171.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/sesizusataxil.pdf
    • https://static.usrfiles.com/ugd/6f9b04_600213154a6d412e91ce1602b19f17d5.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_4dd03b08fb1a4f41804466c6795b33eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_9010707b508d4fe29e5c843adfd177c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_174e2e073a644de3a0131654ed8e6984.pdf
    • https://cdn.shopify.com/s/files/1/0441/1500/1496/files/89486167372.pdf
    • https://cdn.shopify.com/s/files/1/0434/8814/9654/files/depenowixija.pdf
    • https://cdn.shopify.com/s/files/1/0433/4295/4661/files/spices_name_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0430/6108/4322/files/arabic_alphabet_chart_with_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0433/4541/2245/files/florida_contractors_manual_2017_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/nikitorovaseripomuxetopo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6413/8651/files/51817330878.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_off00006a9f.bin
dbc109889a779e0e944016b01d4a389f780803b9bd81685247b52f250550013d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9F 5936 bytes
font_01_sfnt_off00007ee3.bin
438c3386dcfd76e8c0e496894f08c20b8f2a89ddfde56996da1386dfb513f86b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE3 9816 bytes