Malicious PDF — malware analysis report

Static analysis result for SHA-256 82998dd567517ff5…

MALICIOUS

PDF

42.9 KB Created: 2020-08-25 04:33:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ba392b2cc750e5fb68564de6b14818e SHA-1: d24b2012703dbf52138117ac3b720e598d0b2aca SHA-256: 82998dd567517ff5cf92c26e3436f42c65232acfb19037ac7c15b9ebbe386574
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with the primary link identified as a malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and references to other benign-looking PDF files, suggesting a link farm designed to obscure malicious activity. 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.ru/pify?keyword=jigsaw+reading+activities+worksheets
    • http://files.rainbowjewelryshop.com/uploads/1/3/1/3/131383318/50e36b15.pdf
    • http://kazibo.eastcoastcakeco.com.au/uploads/1/3/1/3/131380600/cb07c8a85f6.pdf
    • http://files.kasl.us/uploads/1/3/0/7/130739621/b22886d44c.pdf
    • http://wisen.glennmehrbach.com/uploads/1/3/1/4/131407406/7006303.pdf
    • http://rataxox.theredpillrenegade.com/uploads/1/3/1/4/131483167/7621396.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/2192/4514/files/pdf_to_word_ocr_windows.pdf
    • https://cdn.shopify.com/s/files/1/0429/2309/8279/files/tapujugagigo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7403/5607/files/levogimulatejugezapizoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/8048/9891/files/84535055952.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/botudurodakokebavexosox.pdf
    • https://cdn.shopify.com/s/files/1/0434/4309/3670/files/budaya_yogyakarta.pdf
    • https://cdn.shopify.com/s/files/1/0433/9027/1642/files/how_to_change_mac_address_on_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66689816557.pdf
    • https://cdn.shopify.com/s/files/1/0431/9327/0429/files/gifomubilisalunodewoxidil.pdf
    • https://cdn.shopify.com/s/files/1/0430/0577/1927/files/66971558279.pdf
    • https://cdn.shopify.com/s/files/1/0444/5339/6647/files/50_examples_of_collective_nouns.pdf
    • https://cdn.shopify.com/s/files/1/0432/0172/4580/files/lewavugerowogesetudaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/9121/3988/files/anno_domini_1257_guide_fr.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006970.bin
f1fe5e2f9ff24747eeb6ae09b90313fe51e8e888eb7e156224284b09900b294e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6970 5376 bytes
font_01_sfnt_off00007bc4.bin
7a81287cc4066c7fe086b1b9123a4699e16ff087e3fc3d809e28038c6a822c65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC4 10024 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.