Malicious PDF — malware analysis report

Static analysis result for SHA-256 2feb2e9333c021b7…

MALICIOUS

PDF

40.3 KB Created: 2020-08-24 11:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea7c346b3757fc6cf93f4bfb26a8f43b SHA-1: 97cc1f14be64075b6d4c2b3638f8b888ec032f60 SHA-256: 2feb2e9333c021b73291e54542f57a85e44ef488e2e3485a9abd33ef247ed365
154 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for containing links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of an SEO link farm, with numerous external PDF links. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=marketing+campaign+sample+pdf', which is identified as a malicious redirector. This suggests the primary intent is to lure users to malicious sites through a deceptive 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=marketing+campaign+sample+pdf
    • http://files.21stcenturymediaplanning.com/uploads/1/3/1/6/131607630/1335168.pdf
    • http://xataxigo.jenniferkeahey.com/uploads/1/3/0/7/130775735/6595872.pdf
    • http://files.unccaareclinic.com/uploads/1/3/1/4/131438419/leluzife.pdf
    • http://femizoda.duarteband.com/uploads/1/3/1/4/131454065/rakevijelapof_bamugabugin_pitukixoti_motenatuxejif.pdf
    • https://cdn.shopify.com/s/files/1/0448/0906/0518/files/allamanda_cathartica_medicinal_uses.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/81833383832.pdf
    • https://cdn.shopify.com/s/files/1/0435/4434/6792/files/davids_bridal_99_sale_2017.pdf
    • https://cdn.shopify.com/s/files/1/0430/9306/5881/files/pdf_to_word_converter_software_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/18269668054.pdf
    • https://cdn.shopify.com/s/files/1/0428/9134/6079/files/13473163861.pdf
    • https://cdn.shopify.com/s/files/1/0436/5379/1909/files/puwebik.pdf
    • https://cdn.shopify.com/s/files/1/0461/2105/8468/files/firefox_52_32_bit_esr.pdf
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/birdwatching_book.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_off00005ea8.bin
2be2e33d2aa7d8ff275ec5ddbc5abab481cc926db71254fff9053ca7dd461ed6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA8 5544 bytes
font_01_sfnt_off00007175.bin
8003f7b09cb28d1a9030ee1bcfded9fd56ee78f768eff86e027fc20e35784931
pdf-font-stream PDF embedded font (sfnt) at offset 0x7175 10340 bytes