Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a8f607a0cedd21e…

MALICIOUS

PDF

43.5 KB Created: 2020-08-04 20:58:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a9ddf3389b386e1450efbf9a8074d45 SHA-1: 5a47926fe624ee58e9b4aee6d0762df858e4581e SHA-256: 5a8f607a0cedd21e561327deff9541f6d0e87acfd0dfd0665d7a64c5814bb0f6
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure at `https://ttraff.cc/pify?keyword=passport+form+ds+11+pdf`. This suggests the document is designed to redirect users to malicious sites, likely for phishing or malware distribution. The presence of many external PDF links further supports a link farm or redirection strategy.

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.cc/pify?keyword=passport+form+ds+11+pdf
    • http://files.penncrestlions.com/uploads/1/3/1/8/131871453/24783.pdf
    • http://files.annagalatirealtor.com/uploads/1/3/0/7/130776718/979473.pdf
    • http://files.apowersphotography.com/uploads/1/3/1/1/131164479/13b06.pdf
    • http://files.moxieandmortar.com/uploads/1/3/0/9/130970016/zumuzopa-nubetew-xarafuxebikem.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/0046/2503/files/98174860832.pdf
    • https://cdn.shopify.com/s/files/1/0429/6205/9427/files/structural_analysis_hibbeler.pdf
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/19373551040.pdf
    • https://cdn.shopify.com/s/files/1/0432/8492/2526/files/47198142729.pdf
    • https://cdn.shopify.com/s/files/1/0436/9874/9608/files/pofazebomefulo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1123/6259/files/jariruduw.pdf
    • https://cdn.shopify.com/s/files/1/0432/1574/9281/files/payment_of_gratuity_act_mcq.pdf
    • https://cdn.shopify.com/s/files/1/0433/4105/4105/files/5626740389.pdf
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/76480395380.pdf
    • https://cdn.shopify.com/s/files/1/0431/0047/1456/files/7384926039.pdf
    • https://cdn.shopify.com/s/files/1/0437/7359/1703/files/fevazalanoxotejedawe.pdf
    • https://cdn.shopify.com/s/files/1/0427/9674/4871/files/29123146379.pdf
    • https://cdn.shopify.com/s/files/1/0436/0349/3026/files/6488052739.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061c8.bin
dab60b3bcc24bb597bf2b0cecca42fa53df90eb08086aa07851c3e5662f8048a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C8 4724 bytes
font_01_sfnt_off000071cd.bin
250e5cba234efb2e6e80db07d63a9b98ec9d448b44687f722e1a19838ab82bd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71CD 9776 bytes
font_02_sfnt_off00009348.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9348 4324 bytes

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