Malicious PDF — malware analysis report

Static analysis result for SHA-256 067982c5d7d4bf06…

MALICIOUS

PDF

45.1 KB Created: 2020-08-10 21:17:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60c8503bf1f190d57231bc1ece4ddb27 SHA-1: 2a7a78f3b78d59772d18ba8d41151c5048449430 SHA-256: 067982c5d7d4bf068d5562cbcd44279b5ce8c39ccd293459c5627611bdc02af6
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, ttraff.com. The document body, though heavily obfuscated, contains text related to leadership models and the URL itself, suggesting a lure to trick users into clicking the malicious link. 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.com/pify?keyword=hersey+blanchard+situational+leadership+model+pdf
    • http://files.sum-lab.org/uploads/1/3/1/8/131871499/ziwutajelivo-rapini.pdf
    • http://files.rfplfoundation.org/uploads/1/3/1/4/131437702/masebopepu-pilifuwi.pdf
    • http://buxeguwaw.lyssanda-designs.com/uploads/1/3/1/4/131408024/5159237.pdf
    • http://files.vancourtcustomcabinetry.com/uploads/1/3/1/1/131164021/87022e91.pdf
    • http://files.heartlandarchery.ca/uploads/1/3/2/3/132302907/bubutoxitag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6241/8846/files/sadasonegileta.pdf
    • https://cdn.shopify.com/s/files/1/0441/2178/4472/files/localhost_index._html.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/59267237408.pdf
    • https://cdn.shopify.com/s/files/1/0433/8273/5006/files/87241980087.pdf
    • https://cdn.shopify.com/s/files/1/0430/4817/3722/files/wheel_of_time_book_1_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/1723/9704/files/85862328689.pdf
    • https://cdn.shopify.com/s/files/1/0429/4764/1511/files/topupofitizebi.pdf
    • https://cdn.shopify.com/s/files/1/0453/3213/6091/files/mirae_asset_mutual_fund_form.pdf
    • https://cdn.shopify.com/s/files/1/0435/4415/0165/files/91925426197.pdf
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/watch_wwe_hell_in_a_cell_2016.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/35504975269.pdf
    • https://cdn.shopify.com/s/files/1/0438/0108/4064/files/new_destination_a1.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_off000072a2.bin
44d6512bdd0eb4efff382c78d171b89d8d2ef204fd9efede80c9488a976b78ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72A2 5600 bytes
font_01_sfnt_off00008570.bin
bde48b7268d19cacef00565f895c9227d5457cedf0386b617274de9bba6fe609		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8570 9812 bytes

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