Malicious PDF — malware analysis report

Static analysis result for SHA-256 b222018da291f7b4…

MALICIOUS

PDF

51.2 KB Created: 2020-09-06 15:25:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d81f88be5f6657eefd1bd61a04771390 SHA-1: 426447df3d1509daa42122f03b624edea78c5372 SHA-256: b222018da291f7b4a9fab43d08208885ceeee16f28c35356c49ed0e93f61f164
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=types+of+cartels+in+economics+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL and a reference to 'types of cartels in economics pdf', suggesting a lure to disguise malicious intent. No scripts were extracted, but the primary attack vector appears to be directing users to a malicious site.

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.me/wix?keyword=types+of+cartels+in+economics+pdf
    • https://cdn.shopify.com/s/files/1/0438/1140/5986/files/xikowanajixem.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6349/files/zuminofinonewojalamevarid.pdf
    • https://cdn.shopify.com/s/files/1/0431/0047/1456/files/pibexowa.pdf
    • https://cdn.shopify.com/s/files/1/0437/3181/2504/files/catholic_prayers_in_latin_and_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8053/files/rirasumezekulemidapix.pdf
    • https://static.usrfiles.com/ugd/097bd5_3a6feaefa348499b8c6418c772f68b8d.pdf
    • https://cdn.shopify.com/s/files/1/0449/0631/5943/files/beresheet_hotel_restaurant_menu.pdf
    • https://cdn.shopify.com/s/files/1/0439/2707/7032/files/reducing_and_non_reducing_sugars.pdf
    • https://cdn.shopify.com/s/files/1/0433/6828/4319/files/12654661869.pdf
    • https://cdn.shopify.com/s/files/1/0429/4026/8711/files/wofufapexegojakaxi.pdf
    • https://cdn.shopify.com/s/files/1/0447/7734/1079/files/heart_anatomy_interior_view_answers.pdf
    • https://static.usrfiles.com/ugd/41a0b6_1b721f6270384fd986d1a7370ab6559c.pdf
    • https://static.usrfiles.com/ugd/70e5f7_b1145dd9069142c8bdf639ff074cf7c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_0b29095131b647f2a26fc780a904d88b.pdf
    • https://static.usrfiles.com/ugd/868f76_4737d705d6e840599a78f4545eeef9b9.pdf
    • https://static.usrfiles.com/ugd/c1108c_e0ff38565862497aaa7cdc195a2bee28.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_off00008b72.bin
c5a8552391476959b51868c12c99ec1994bcd02171db652b931c14dfab1ec9e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B72 5352 bytes
font_01_sfnt_off00009d9a.bin
3c393dd7035b68c41b7f42431a5450ed88a27648f833253d65c7b2be86f8d9be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D9A 10104 bytes

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