Malicious PDF — malware analysis report

Static analysis result for SHA-256 2578ef02485505f1…

MALICIOUS

PDF

39.1 KB Created: 2020-08-13 15:25:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9829fc51eddb07cce3286bad8a7eab62 SHA-1: e1f23a7b596a014978bad80bf0cadeb698275859 SHA-256: 2578ef02485505f1713da1dcbfffc68519e9ed7eb54e581e104f9347295c2e78
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of embedded external links, many of which lead to a redirector service. This suggests a link farm or redirection attack designed to obscure the ultimate destination. The document body contains garbled text and embedded URLs, reinforcing the malicious intent. No scripts were extracted, but the PDF structure itself is indicative of a malicious redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=anyong+tubig+sa+pilipinas+pdf
    • http://files.spanishflamencodance.com/uploads/1/3/0/9/130969896/zirogiveborimurijux.pdf
    • http://files.learn-bhangra.com/uploads/1/3/0/8/130874110/fbc7b6c018ecdf.pdf
    • http://files.osea101.org/uploads/1/3/1/6/131606453/wugapigofone_xoduwofeviw.pdf
    • https://cdn.shopify.com/s/files/1/0431/3455/0177/files/52377351693.pdf
    • https://cdn.shopify.com/s/files/1/0434/5636/4711/files/dozajaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/woxazazapavonib.pdf
    • https://cdn.shopify.com/s/files/1/0436/1859/9075/files/oblivion_guitar_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0438/4364/9698/files/teks_sholawat_burdah.pdf
    • https://cdn.shopify.com/s/files/1/0433/6238/6079/files/vetiwobijizibovinisu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6604/8164/files/4732985759.pdf
    • https://cdn.shopify.com/s/files/1/0429/3096/2588/files/music_artist_profile_sample.pdf
    • https://cdn.shopify.com/s/files/1/0430/6481/9874/files/rozosut.pdf
    • https://cdn.shopify.com/s/files/1/0437/6123/8168/files/pujelodibifafamowaweje.pdf
    • https://cdn.shopify.com/s/files/1/0440/5824/7320/files/psychology_practical_book_class_11.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/lokosidixasufabod.pdf
    • https://cdn.shopify.com/s/files/1/0432/4563/3691/files/64145532150.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_off00005824.bin
5ccd1ebf51e892aacb9af7b5138aa85e78a10b6c4afbb70b376761aeca75b22c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5824 5344 bytes
font_01_sfnt_off00006a6f.bin
553b198adb5e85d53ef3e2d5f2412b71fcda6a0651aa3f5d3ae963a51f0944ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6F 10408 bytes

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