Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead68f026c4a67aa…

MALICIOUS

PDF

33.1 KB Created: 2020-09-06 03:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e76dad3e0b7fb625eb53a74e17a3b3e SHA-1: 2ed182cc9012be498e275c18e7f70e18213f1a15 SHA-256: ead68f026c4a67aa55a8451fa8f231cf103d925f180f5deb3da44bd8330eb0f1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting an attempt to manipulate search results or distribute further malicious content. The presence of the malicious redirector URL points towards a phishing or malware distribution attempt.

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.club/wix?keyword=equilibrant+force+worksheet
    • https://cdn.shopify.com/s/files/1/0463/6511/4523/files/gimitojinuvejubenadaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/8491/3565/files/duel_links_chaos_form_deck.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/34872415529.pdf
    • https://cdn.shopify.com/s/files/1/0428/1355/4855/files/new_movies_free_hollywood.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/bci_battery_group_size_chart.pdf
    • https://cdn.shopify.com/s/files/1/0440/3753/7942/files/deragumomubevukotijixaso.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/basketball_diaries_book.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/zized.pdf
    • https://cdn.shopify.com/s/files/1/0459/2553/1815/files/61283643989.pdf
    • https://cdn.shopify.com/s/files/1/0440/6575/1192/files/xepadalufew.pdf
    • https://cdn.shopify.com/s/files/1/0454/2021/6476/files/xuvipunu.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_off000046e8.bin
d474cacaee83e3c2cc8c31a3f533bbe08201fd297bafde8b2abb18fce03811d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46E8 5348 bytes
font_01_sfnt_off00005930.bin
59b453a23821a6f7face6cfdbf2c92383c405a66e59d0b915c8d84c9efd09b95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5930 9032 bytes

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