Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9262bfe6f70d5f3…

MALICIOUS

PDF

56.1 KB Created: 2020-08-06 23:27:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c6055d1f45955a084299615c960243c SHA-1: 7a235aa5e611ec824c8c6dabcd0c2dab3ad36d9f SHA-256: c9262bfe6f70d5f36974c343516e4496619f99993614ab4dc9921e020ba61ede
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one critical heuristic firing indicating it links to known malicious redirector infrastructure. The ML classifier also flagged this PDF with high confidence. The primary malicious URL identified is https://ttraff.com/pify?keyword=unicode+characters+table+pdf, which likely serves as a redirector to further malicious content or phishing pages. The document body itself is heavily obfuscated and contains embedded URLs, reinforcing the malicious intent.

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=unicode+characters+table+pdf
    • http://files.digitalgathering.org/uploads/1/3/1/3/131383247/valasusugir-sunowedazer-xukeges-domofatu.pdf
    • http://files.sunflowerpreschoolsebastopol.com/uploads/1/3/1/4/131454523/31dde.pdf
    • http://vudajiw.searchlightforensic.com/uploads/1/3/1/4/131407406/5e1d879724f0ce9.pdf
    • http://files.pandakungfucenter.com/uploads/1/3/2/6/132695639/xageraw.pdf
    • http://gifomupa.ouhsdra.org/uploads/1/3/1/4/131437044/ripule-wofiwakizuga-dofavixojorik-datopir.pdf
    • https://cdn.shopify.com/s/files/1/0432/3871/9648/files/86567514187.pdf
    • https://cdn.shopify.com/s/files/1/0433/7755/7660/files/pesozokakido.pdf
    • https://cdn.shopify.com/s/files/1/0434/0213/3656/files/suposawisefefakekaza.pdf
    • https://cdn.shopify.com/s/files/1/0429/2693/2124/files/94387180359.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51439980706.pdf
    • https://cdn.shopify.com/s/files/1/0432/4586/3067/files/besoin_en_fond_de_roulement_calcul.pdf
    • https://cdn.shopify.com/s/files/1/0429/7038/2490/files/27884815238.pdf
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/49354993842.pdf
    • https://cdn.shopify.com/s/files/1/0434/2913/4501/files/wobugataxugizaloduf.pdf
    • https://cdn.shopify.com/s/files/1/0438/4518/9794/files/bakibudesexufewugelirok.pdf
    • https://cdn.shopify.com/s/files/1/0432/4078/4035/files/junutediluwavilezamas.pdf
    • https://cdn.shopify.com/s/files/1/0428/2862/8135/files/physx_loader_dll.pdf
    • https://cdn.shopify.com/s/files/1/0434/6534/3141/files/tutatuninav.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/
    • https://cdn.shopify.com/s/files/1/0434/6534/3141/files/tutat

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e29.bin
97d67fa827ea50fdf74aee0b9aac51809e964fda849ca9d8fa40203d7972d011		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E29 5376 bytes
font_01_sfnt_off00008066.bin
6bcdd4d4a14b38e4400971c6f1e90776e86008bf23d26d653d78d830ee1b58e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8066 19484 bytes
font_02_sfnt_off0000bbf8.bin
16d55efd589094ae7f99e2f84e25103c5e923cbed8e03ca995115ae1182a96d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBF8 16620 bytes

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