Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd50fef77b70b102…

MALICIOUS

PDF

38.1 KB Created: 2020-08-20 07:17:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef30601991e897fc539e99bce9dcfa33 SHA-1: 441105baec74cbcb4599ac2d19779e357fc2e801 SHA-256: bd50fef77b70b102a49a6414dd74d969faf88482abe1d72d5137574700b65ba2
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, contains text related to 'emergency lighting log book template pdf' and the malicious URL. The primary malicious URL is https://ttraff.com/pify?keyword=emergency+lighting+log+book+template+pdf, which is likely used to redirect users to a phishing or malware-hosting site. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=emergency+lighting+log+book+template+pdf
    • http://nipopep.daddysclinic.org/uploads/1/3/2/3/132302720/d2588a457.pdf
    • http://files.longsilverconstruction.com/uploads/1/3/1/4/131437322/bomuwutuvebajavis.pdf
    • http://pejefa.achievewe.org/uploads/1/3/2/7/132740930/rogebapinatibo_bodebumirodi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3749/1354/files/toriputijapemisinoro.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/lujasomub.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17721531589.pdf
    • https://cdn.shopify.com/s/files/1/0430/1897/7443/files/intelligent_business_intermediate_coursebook_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0433/8522/5372/files/49933713582.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0810/files/canada_food_guide_old.pdf
    • https://cdn.shopify.com/s/files/1/0436/4235/5865/files/happy_pongal_images_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/87029160347.pdf
    • https://cdn.shopify.com/s/files/1/0434/7510/7992/files/javascript_resize_image.pdf
    • https://cdn.shopify.com/s/files/1/0434/2707/0104/files/28837145717.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/xuxevukerukamolikonirexa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6427/8686/files/why_is_my_discord_mic_not_working.pdf
    • https://cdn.shopify.com/s/files/1/0432/4553/5400/files/62258783791.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_off00005629.bin
5fc5d0fc2604b58418505402136c652831c22b5146030d4ef8c6b1b0d5cd5d1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5629 5652 bytes
font_01_sfnt_off00006930.bin
1de83322a40ee60befff1ce5228a8eaae5c2a4368152ddca27172666e4e0643f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6930 10056 bytes

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