Malicious PDF — malware analysis report

Static analysis result for SHA-256 8953e7988005dc11…

MALICIOUS

PDF

40.3 KB Created: 2020-08-03 08:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7e966a61bdb2dc56bdd35b820ade72e SHA-1: 67f33d115637977cf4e6fa9efb703c9bd2da1512 SHA-256: 8953e7988005dc1172955c11dc24cf15639e34f4541a807a680fd3bd8f4fab89
154 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary malicious redirector URL pointing to 'https://ttraff.cc/pify?keyword=search+and+rescue+manual+pdf'. This suggests the document is designed to redirect users to malicious content, likely for phishing or malware distribution. The ML classifier strongly supports the malicious nature of this PDF.

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=search+and+rescue+manual+pdf
    • http://files.deadbeatphotography.com/uploads/1/3/0/7/130776485/xajejumijiv_duvator_nosiruti.pdf
    • http://files.dkgwa.org/uploads/1/3/0/7/130775247/dagugaj_jipawoxavekila_deliwogivozu_jinote.pdf
    • http://files.wethersfieldwoolfarm.com/uploads/1/3/1/3/131397987/suxex.pdf
    • http://files.cabincreekfarmstudio.com/uploads/1/3/2/3/132303312/b7046f50786401.pdf
    • https://cdn.shopify.com/s/files/1/0431/3595/9191/files/66091904300.pdf
    • https://cdn.shopify.com/s/files/1/0433/1791/9909/files/74589608671.pdf
    • https://cdn.shopify.com/s/files/1/0429/0061/9423/files/buwabatakafanugab.pdf
    • https://cdn.shopify.com/s/files/1/0431/1908/3677/files/95751365399.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/97146693602.pdf
    • https://cdn.shopify.com/s/files/1/0430/0416/6297/files/21944060505.pdf
    • https://cdn.shopify.com/s/files/1/0433/2178/6521/files/48829313625.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/bolatere.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4520/files/dunati.pdf
    • https://cdn.shopify.com/s/files/1/0440/8537/9237/files/mirilide.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7182/files/27587753907.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057c6.bin
128614c78d05b61720a8113469ee7a125fa767d1a16b7c6dec1d682a243b8088
pdf-font-stream PDF embedded font (sfnt) at offset 0x57C6 5500 bytes
font_01_sfnt_off00006a4c.bin
b1d1ffbf739d736c95112a49683798f60727453e3e82e5905d318fe5ec75b34c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4C 13164 bytes