Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d5017f294b253bd…

MALICIOUS

PDF

45.0 KB Created: 2020-07-28 12:54:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25c1ea3ec1c64f3d5c135588b52dc550 SHA-1: 0b204ecc158eb20e176358234cb321e6942d7082 SHA-256: 3d5017f294b253bdb809991a4e4d8fe11da463252b32d7bfe4d30ca1db07ebc8
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is designed to lure users with a keyword related to network sniffing tools. Additionally, a PDF link farm heuristic indicates the presence of numerous external links, many hosted on 'cdn.shopify.com', suggesting a broad distribution or SEO-based lure strategy. The ML classifier also strongly flagged this PDF as malicious.

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=android+studio+network+sniffer
    • http://files.walkerabel.com/uploads/1/3/1/8/131856339/65882494e88e1.pdf
    • http://files.paperowlpress.com/uploads/1/3/2/3/132303209/3109681.pdf
    • http://files.claysmithcreativesltd.com/uploads/1/3/2/6/132695258/rebeze-rinafojaf-fofinata.pdf
    • http://files.aacnationals2016.com/uploads/1/3/2/6/132695416/a1e0b.pdf
    • https://cdn.shopify.com/s/files/1/0437/2021/2645/files/wefirizafenomek.pdf
    • https://cdn.shopify.com/s/files/1/0438/3893/1109/files/fetawopini.pdf
    • https://cdn.shopify.com/s/files/1/0440/0431/1190/files/11451901874.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20659662050.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gumatuzonew.pdf
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/jetorote.pdf
    • https://cdn.shopify.com/s/files/1/0437/2591/4262/files/88484136688.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97454987384.pdf
    • https://cdn.shopify.com/s/files/1/0432/2190/9662/files/rufomulupejariki.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/fojinenekikitubole.pdf
    • https://cdn.shopify.com/s/files/1/0432/0192/1184/files/vutugewiribolinas.pdf
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/redovopanoda.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/gigomufejulawexiva.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_off000074b3.bin
4d9dc046eaa9b237346f67b4a2c4b1d1dde53b2a529ed0ca85e11dac1566b3fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x74B3 4684 bytes
font_01_sfnt_off000084be.bin
fffb17bd07a8e22453a7bf24f9f2251f2d590cbbe16f9380ca677900a2b3541f
pdf-font-stream PDF embedded font (sfnt) at offset 0x84BE 10076 bytes