Malicious PDF — malware analysis report

Static analysis result for SHA-256 af9fe5d0cfd9be51…

MALICIOUS

PDF

52.5 KB Created: 2020-08-20 14:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c42437bd0a28ebd25112d5c4ef46f99 SHA-1: d5c827baa7c91cac0f9b8d453648028a6de6d413 SHA-256: af9fe5d0cfd9be51cd7b7d0c1ce50784153df57fdfcbc64a5138ee6a86268b9a
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was identified as malicious due to its inclusion of a link farm containing numerous external links, with a critical finding pointing to a redirector URL. The document body, though heavily obfuscated, contains the same redirector URL and a link to a PDF hosted on Shopify. This suggests a tactic of using a link farm to obscure the ultimate malicious destination, likely for phishing or malware delivery.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=blynksimpleesp8266.+h+library
    • http://files.edgewoodbands.com/uploads/1/3/2/6/132682739/da6191bfcff6.pdf
    • http://zazobi.visionectc.com/uploads/1/3/0/7/130738764/4225855.pdf
    • https://cdn.shopify.com/s/files/1/0433/5344/0414/files/sivemuvazogodemalap.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5098/files/berlingo_dimensions.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rosetotirumeza.pdf
    • https://cdn.shopify.com/s/files/1/0448/2813/1485/files/allen_test_papers_2017_jee.pdf
    • https://cdn.shopify.com/s/files/1/0436/5189/1358/files/autoit_tutorial_deutsch.pdf
    • https://cdn.shopify.com/s/files/1/0437/1267/5995/files/fitomolokoraxujumoparutix.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7884/files/common_poultry_diseases_and_symptoms.pdf
    • https://cdn.shopify.com/s/files/1/0433/9616/9886/files/illustrated_encyclopedia_of_world_history.pdf
    • https://cdn.shopify.com/s/files/1/0448/3871/5552/files/nsca_cscs_practice_exam.pdf
    • https://cdn.shopify.com/s/files/1/0435/8930/4477/files/rodukate.pdf
    • https://cdn.shopify.com/s/files/1/0434/4899/1910/files/luzoresolo.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/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000063c8.bin
a85bb32776581042a386051797ab1fc1cc0fece9b61bdfcd95e1a581a6cde40c
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x63C8 9692 bytes
font_00_sfnt_off00004fd5.bin
434728800073387f83c33ba56d82b8ef7462d4dfaeab81b951656d9134316d5a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4FD5 5928 bytes
font_02_sfnt_off00007f73.bin
0c22fe68b1f0d4d3d19fa3ca6c16694020a2ebcdedf98c283c625e9222fbce20
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F73 13932 bytes
font_03_sfnt_off0000ac74.bin
f409240d4c14e218c897f4b732492221056c5b1d3ce396baf71dd7822694cbf9
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC74 17464 bytes