Malicious PDF — malware analysis report

Static analysis result for SHA-256 1150f7d83c7faab6…

MALICIOUS

PDF

43.1 KB Created: 2020-08-14 03:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41916dc606ff8734f7481f1af0d2c74b SHA-1: 272df571d7f84e897c4b372ce7fd1e47c5098292 SHA-256: 1150f7d83c7faab634c25afc49de6286a9e24844d356706dea88c2756b19fdec
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=kangaroo+paw+fact+sheet', suggesting a lure to external content. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, likely for SEO manipulation or to distribute malicious content, further supporting 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.ru/pify?keyword=kangaroo+paw+fact+sheet
    • http://vugupaza.nayloreagles.com/uploads/1/3/0/8/130813846/kifegexapoz.pdf
    • http://files.sheknowsadventure.com/uploads/1/3/1/4/131438829/7a177.pdf
    • http://files.projectrestor.com/uploads/1/3/1/8/131872198/618849.pdf
    • http://sudekap.authorizedealers.com/uploads/1/3/1/4/131453645/todipovofetosi.pdf
    • http://files.gbarfibers.com/uploads/1/3/1/4/131454916/1129217.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/6296/6937/files/guwonojilakijo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5234/2184/files/41757341566.pdf
    • https://cdn.shopify.com/s/files/1/0434/2359/6693/files/asme_b16._9_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/4214/3388/files/netherlands_train_map_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7381/files/tetutodanorob.pdf
    • https://cdn.shopify.com/s/files/1/0429/3869/5846/files/mexazatenakebet.pdf
    • https://cdn.shopify.com/s/files/1/0430/0813/1233/files/45142456048.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/cell_biology_genetics_molecular_biology_evolution_and_ecology_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/53378860379.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0439/files/learning_and_development.pdf
    • https://cdn.shopify.com/s/files/1/0429/2971/7407/files/92839261149.pdf
    • https://cdn.shopify.com/s/files/1/0429/2296/7207/files/37531837313.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/jozedojilumenet.pdf
    • https://cdn.shopify.com/s/files/1/0432/1610/9736/files/76786492470.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_off00006b5b.bin
32d504c03a25adaad6da083ba70f6fef356359b407150bc9272adf3a04a87799		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5B 5304 bytes
font_01_sfnt_off00007d7d.bin
cde4d23c0fda51db466d341ff0d2123f8a7466fc3e46614f3e2a6cdc94802906		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7D 9912 bytes

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