Malicious PDF — malware analysis report

Static analysis result for SHA-256 e68d0df6d1aaacc6…

MALICIOUS

PDF

40.4 KB Created: 2020-09-02 16:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3ffd2bcd634e4549ededfe8f0b9a10b SHA-1: 477baaf624bca24583a9ad04b0584c036309be95 SHA-256: e68d0df6d1aaacc6f2c5e27f10a1da891e400cac9a358d9bda42167b14a7863b
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically to `https://ttraff.club/wix?keyword=installation+guide+rail+lowes`. This technique is often used to deliver secondary payloads or phish for credentials. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted from this sample.

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.club/wix?keyword=installation+guide+rail+lowes
    • https://static.usrfiles.com/ugd/b8c837_98999d05c9434b8fb7a634a0e4bb6b43.pdf
    • https://static.usrfiles.com/ugd/b3bc21_25094a4eeb9a4f1ba36ca54d5ba47fea.pdf
    • https://static.usrfiles.com/ugd/fb83f1_d130c2bfa6894457862a5e661ad75626.pdf
    • https://static.usrfiles.com/ugd/158fb9_55879aaa342c4f78af068cabf06490cc.pdf
    • https://static.usrfiles.com/ugd/79e0dc_62b012aa2d684dacbc1a6858c59e14b4.pdf
    • https://cdn.shopify.com/s/files/1/0437/1798/4410/files/58119709094.pdf
    • https://cdn.shopify.com/s/files/1/0450/1169/7814/files/history_of_english_literature_book.pdf
    • https://cdn.shopify.com/s/files/1/0465/0395/2542/files/costa_rica_travel_guide_expedia.pdf
    • https://cdn.shopify.com/s/files/1/0433/2853/6734/files/23739661288.pdf
    • https://cdn.shopify.com/s/files/1/0427/7541/2902/files/agricultural_engineering_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0432/4114/4483/files/medan_magnet_kelas_12.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/dryer_sheets_keep_rodents_away.pdf
    • https://static.usrfiles.com/ugd/b8c837_b54901a16fa140ae866ad1d87633440b.pdf
    • https://static.usrfiles.com/ugd/0ebc1f_35d05f53b3d24260a257b9fcd0d7bd99.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5c2cf93c6d043be8a06f2c6d6083b17.pdf
    • https://static.usrfiles.com/ugd/430cb2_22ac7068fa51494980292d128e6da2c6.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_off00006204.bin
e5031e555164542611c365a552d2c0ce8e60fb1bd16f6a74ac023a15df60c002
pdf-font-stream PDF embedded font (sfnt) at offset 0x6204 5020 bytes
font_01_sfnt_off00007333.bin
e6beefb0a5c1050d46a3202d74f8d824fa05e88c4cb3367c79a7c70c2e1c39e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7333 9900 bytes