Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f24e1376a3305f…

MALICIOUS

PDF

46.1 KB Created: 2020-08-03 23:43:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a0a51f92e34b8295b0254dae698aa59 SHA-1: 00a19153ba8a654ee734d9f9c0cd1aefde43d8fa SHA-256: 01f24e1376a3305f32de26880a17e9a3b68be0cfd31ebccb3a239bed004f1620
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to malicious redirector infrastructure, specifically `https://ttraff.cc/pify?keyword=%25C3%25A9valuation+orthographe+ce2+pdf`. It also exhibits characteristics of a link farm, embedding numerous external PDF links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The embedded link likely serves as the initial lure, potentially leading to further malicious content or phishing attempts.

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=%25C3%25A9valuation+orthographe+ce2+pdf
    • http://files.oskfc.net/uploads/1/3/0/7/130775373/cf02b9e7c21b.pdf
    • http://files.whatisforhomework.com/uploads/1/3/1/6/131637928/30fd7f706e9.pdf
    • http://files.litguidesatmhs.com/uploads/1/3/1/0/131071277/272b85db3dca4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0438/4486/2114/files/kusuxoguxuwumubujewa.pdf
    • https://cdn.shopify.com/s/files/1/0437/6900/4190/files/fakaxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/4121/6917/files/squiggly_mouth_emoji.pdf
    • https://cdn.shopify.com/s/files/1/0428/7443/7791/files/polaris_sportsman_500_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/9679/3503/files/84927909049.pdf
    • https://cdn.shopify.com/s/files/1/0429/0609/1687/files/20463569194.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/wozozixuwipadenoguji.pdf
    • https://cdn.shopify.com/s/files/1/0437/6667/7655/files/49735438828.pdf
    • https://cdn.shopify.com/s/files/1/0432/7361/7568/files/rudul.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2719/files/beyonce_lemonade_free_mp3_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jezimix.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0660/files/98109050831.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_off00006475.bin
7b70fb13e109f5b611aaa9f27d3d62965f80089df355e397b88460480de0e179		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6475 5292 bytes
font_01_sfnt_off00007677.bin
03a72004a51d9da6ee681c92f255efd21e86151852236b5e923c408c9a1d8c80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7677 11780 bytes
font_02_sfnt_off00009bb0.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BB0 4324 bytes

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