Malicious PDF — malware analysis report

Static analysis result for SHA-256 1325ebcb1b0eeae2…

MALICIOUS

PDF

47.4 KB Created: 2020-08-02 02:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c42f5af81b7b5784314b1ecc8101d3d SHA-1: f2a3ac54d346c2a4a9b5b2a61fe2d2c310735cfa SHA-256: 1325ebcb1b0eeae2efa800489fc047f0422f9f7254fcb268f157b2ae5fe0168e
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.ru'. It also exhibits a PDF link farm heuristic, with numerous external PDF links, many hosted on Shopify. The embedded URL 'https://ttraff.ru/pify?keyword=conjugation+of+seguir' is the primary indicator of malicious intent, likely serving as a lure for phishing or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the attack.

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=conjugation+of+seguir
    • http://files.scatteringtheseed.com/uploads/1/3/1/4/131408970/f4a117bb827.pdf
    • http://files.castirongrilllubbock.com/uploads/1/3/1/4/131453436/wewidikebota.pdf
    • http://files.buffalo-hood-cleaning-services.com/uploads/1/3/1/3/131380343/toxogep-zagevifod-reloduge.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/0234/7168/files/60015786850.pdf
    • https://cdn.shopify.com/s/files/1/0439/4424/7451/files/c_card_game.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/mazumukusiridulisarugetet.pdf
    • https://cdn.shopify.com/s/files/1/0429/7677/2250/files/92634508911.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/wuxafunewu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6713/8470/files/62106346472.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/tolazawuborutepabexojumu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/6198534542.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemulubu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0839/2353/files/how_to_bold_discord.pdf
    • https://cdn.shopify.com/s/files/1/0431/0256/8599/files/45767794991.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006942.bin
e40656b68caefb7a5c1be3e08d2659bb68621021e2080537954841321259f13a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6942 4884 bytes
font_01_sfnt_off000079fa.bin
ce378fb98425ef07e42fb96b12849e1fba3e5a04cb0735e2d5e34e4c6db56ed6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79FA 12552 bytes
font_02_sfnt_off0000a2c9.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2C9 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.