Malicious PDF — malware analysis report

Static analysis result for SHA-256 10c44c750e586d2c…

MALICIOUS

PDF

42.0 KB Created: 2020-08-19 23:15:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0c1111b8822781422e8e500481ffd75 SHA-1: d2702345a019cd43a62f7f0084fdc6f31c597ccf SHA-256: 10c44c750e586d2c02524dcb5a0be696c2573aaf4f5a4f9e177ad964620972f2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One prominent link, 'https://ttraff.ru/pify?keyword=iso+to+usb+bootable+software', is identified as a malicious redirector. The document also exhibits social engineering tactics, instructing the user to execute commands, consistent with ClickFix attacks. No scripts were extracted, but the presence of malicious redirectors and the social engineering lure strongly suggest an attempt to lead the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.ru/pify?keyword=iso+to+usb+bootable+software
    • http://files.jano65.com/uploads/1/3/2/3/132302710/dowokapapaf.pdf
    • http://files.steamdiscoverylabbeta.com/uploads/1/3/0/7/130776180/depodisigudu-tifaminudalona.pdf
    • http://files.timepathway.com/uploads/1/3/1/4/131453969/1df19f7f27c.pdf
    • http://sipapedem.cabinaselshaddai.com/uploads/1/3/1/3/131380284/velopape.pdf
    • http://nakim.livewellwithkell.com/uploads/1/3/0/7/130775903/wefubemajojaka.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0659/0104/files/74051284207.pdf
    • https://cdn.shopify.com/s/files/1/0432/0450/9853/files/zugonabipividafuka.pdf
    • https://cdn.shopify.com/s/files/1/0429/1955/9335/files/87734984381.pdf
    • https://cdn.shopify.com/s/files/1/0437/9040/1687/files/business_intelligence_tools_comparison.pdf
    • https://cdn.shopify.com/s/files/1/0454/6071/7726/files/83474254954.pdf
    • https://cdn.shopify.com/s/files/1/0431/9795/6258/files/lilivamazomesukax.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/pulisezakazilufokol.pdf
    • https://cdn.shopify.com/s/files/1/0432/4828/7912/files/24446232159.pdf
    • https://cdn.shopify.com/s/files/1/0440/4042/1541/files/cibc_annual_report_2017.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94323725826.pdf
    • https://cdn.shopify.com/s/files/1/0452/0207/9893/files/19734905310.pdf
    • https://cdn.shopify.com/s/files/1/0439/5050/6152/files/63817339218.pdf
    • https://cdn.shopify.com/s/files/1/0431/3976/0295/files/tatilupavozumuxirug.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_off00006703.bin
e3ad43f1437d28c228660d50fabae98dde05b902631d5b4ef768da48836540e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6703 4928 bytes
font_01_sfnt_off000077e6.bin
465aa713946305d4198af2db911c68b94f2bc04e06b6f04aa1c18a5c7bce77cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77E6 10392 bytes

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