Malicious PDF — malware analysis report

Static analysis result for SHA-256 03f31cadf8e60a08…

MALICIOUS

PDF

50.5 KB Created: 2020-08-06 18:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b314f4638a93d1723374e67455b2428a SHA-1: 30edd60d6fb84bc92a74edc44029bd02fe68a57a SHA-256: 03f31cadf8e60a083306376e6c964c3ada2a64f059a6004a53604c1394e33ebd
154 Risk Score

Malware Insights

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

This PDF document contains a link to a known malicious redirector infrastructure, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=riesgo+laboral+en+enfermeria+pdf', suggesting a lure to a malicious site. The presence of numerous other PDF links, as flagged by PDF_SEO_LINK_FARM, indicates a link farm designed to distribute malicious content or SEO spam.

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=riesgo+laboral+en+enfermeria+pdf
    • http://files.cedartrees.org/uploads/1/3/2/7/132741149/fexakopa.pdf
    • http://files.oldtowntheatre-huntsville.org/uploads/1/3/0/7/130775768/bfb941548e93.pdf
    • http://files.whsmusic.net/uploads/1/3/0/7/130740213/8324048.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0448/0725/8269/files/stihl_blower_bg55.pdf
    • https://cdn.shopify.com/s/files/1/0432/8495/5300/files/unity_cutout_shader.pdf
    • https://cdn.shopify.com/s/files/1/0428/2669/4822/files/82011882782.pdf
    • https://cdn.shopify.com/s/files/1/0428/8167/9523/files/87657572538.pdf
    • https://cdn.shopify.com/s/files/1/0437/6847/9893/files/94200643312.pdf
    • https://cdn.shopify.com/s/files/1/0432/3462/3643/files/baganijixoniledosasa.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0099/files/fugilib.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6273/files/mouseover_macros_wow.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29025511016.pdf
    • https://cdn.shopify.com/s/files/1/0432/2089/3851/files/anthropology_syllabus_for_wbcs_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vemuvuferakodumi.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_off00007854.bin
203772232ddf24a711808e63b6a85be17b13b92c9db89645626dfaeaec9d1aec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7854 5216 bytes
font_01_sfnt_off000089e5.bin
e3e15f08a5268829997c90299b8b01cc1f90c5e292ee397a20b180bc22f66ee9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89E5 10920 bytes
font_02_sfnt_off0000ad9e.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD9E 4324 bytes

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