Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe4cffb23f06c624…

MALICIOUS

PDF

45.8 KB Created: 2020-08-02 12:49:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3d7ca606a208b93f0ae5685cea653f9 SHA-1: 8c2919f2049b0da2a9a969fc0d1240ae16ce0275 SHA-256: fe4cffb23f06c624a75b49f51adbe69afd785f2f50581cc6f5211bca998d6fe6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, many of which point to a redirector service. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=rails+generate+migration', which is also flagged as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of specific execution behaviors.

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=rails+generate+migration
    • http://files.rgvmenu.com/uploads/1/3/1/6/131636589/buxaxobadavop.pdf
    • http://files.huapaiponyclub.co.nz/uploads/1/3/0/7/130776350/bejujomowogiwag.pdf
    • http://files.hwcroquetclub.com/uploads/1/3/0/8/130874324/b3ef6f95883211.pdf
    • https://cdn.shopify.com/s/files/1/0438/2218/6656/files/fivozevulixudorejodusixe.pdf
    • https://cdn.shopify.com/s/files/1/0428/6955/5356/files/54658825622.pdf
    • https://cdn.shopify.com/s/files/1/0431/0669/7367/files/98661860834.pdf
    • https://cdn.shopify.com/s/files/1/0432/9259/0236/files/dark_souls_the_board_game.pdf
    • https://cdn.shopify.com/s/files/1/0435/9405/5843/files/levi_524_boot_cut.pdf
    • https://cdn.shopify.com/s/files/1/0428/9580/2527/files/32894574250.pdf
    • https://cdn.shopify.com/s/files/1/0438/1632/1184/files/rejasapaxo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9544/0040/files/jimebibowe.pdf
    • https://cdn.shopify.com/s/files/1/0440/8056/2326/files/wogolar.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/64939844668.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/suramagufumaxuragozud.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000694e.bin
90d3c43869b1028f9bf7781bf37f6395d944d1597666f145122ff606e2214cad
pdf-font-stream PDF embedded font (sfnt) at offset 0x694E 4800 bytes
font_01_sfnt_off00007978.bin
4d8ae69c17ffda59d453f814985d8721b0caf8a3c24c10aefed4974ab470f659
pdf-font-stream PDF embedded font (sfnt) at offset 0x7978 10180 bytes
font_02_sfnt_off00009c62.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C62 4324 bytes