Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1dce712715584bc…

MALICIOUS

PDF

43.4 KB Created: 2020-08-24 23:29:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c64da33c0bccf9e4b814713e936b9f0 SHA-1: dc52c3b305eaeca7a39831f1446b56c738991a1b SHA-256: a1dce712715584bc6277a5c152731d18fd587534ee1d328e21a9ae25e18932e3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous links, many pointing to a link farm hosted on Shopify, designed to obscure the ultimate destination. The primary malicious link, https://ttraff.com/pify?keyword=html+responsive+template+w3schools, is a known redirector. The ML classifier strongly indicated maliciousness, and the overall structure suggests a phishing or scam attempt leveraging a deceptive document title.

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=html+responsive+template+w3schools
    • http://fadez.maggiegreenwayart.com/uploads/1/3/1/4/131438003/2076b.pdf
    • http://files.oregonstateinvestmentgroup.com/uploads/1/3/1/8/131872149/6871610.pdf
    • http://files.bestmusicteacherever.com/uploads/1/3/1/8/131871816/8074238.pdf
    • http://files.filmlovables.com/uploads/1/3/1/4/131438120/rarujelazex.pdf
    • http://files.hilton-mun.org/uploads/1/3/2/6/132682883/3747986.pdf
    • http://files.hilton-mun.org/upload
    • https://cdn.shopify.com/s/files/1/0430/5505/4999/files/melaruvodukepivanugo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0667/3575/files/8729110131.pdf
    • https://cdn.shopify.com/s/files/1/0438/8667/4088/files/altivar_21_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/4409/1557/files/41271938074.pdf
    • https://cdn.shopify.com/s/files/1/0427/9874/3719/files/78910668919.pdf
    • https://cdn.shopify.com/s/files/1/0434/7920/4006/files/zivugulujogubo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7184/0161/files/all_formula_of_maths_class_10.pdf
    • https://cdn.shopify.com/s/files/1/0437/0297/6666/files/97031278636.pdf
    • https://cdn.shopify.com/s/files/1/0435/1367/5928/files/78550612087.pdf
    • https://cdn.shopify.com/s/files/1/0433/6081/3208/files/probability_distribution_example_and_solution.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3794/files/online_movies_hollywood_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/4334/0956/files/71958292269.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/gutas.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_off00006c6c.bin
deb61616fcce0257e50644708c2b4a55128217217be8966af58cb7d821524f31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6C 5448 bytes
font_01_sfnt_off00007ed2.bin
963df452a87e2018093e96aaa91e9ecc40deeb704e00da88c873ae7b17f0556c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED2 9796 bytes

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