Malicious PDF — malware analysis report

Static analysis result for SHA-256 6031f38d1665bec6…

MALICIOUS

PDF

44.5 KB Created: 2020-08-11 00:22:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b00cfc8cbdaf3b21d9be8c0c225f010 SHA-1: 8767d905373c45f4de2a174509186663a23b2438 SHA-256: 6031f38d1665bec686609fc4e65c7251e594c668991f71c889ea4e842bf5b3b2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body and embedded links suggest an attempt to drive traffic to potentially malicious or spam-related websites, possibly for SEO manipulation or phishing. The ML classifier strongly indicated maliciousness.

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.ru/pify?keyword=tabata+protocol+pdf
    • http://files.countrify.ca/uploads/1/3/1/4/131453944/abbc5a231.pdf
    • http://files.growingupsewing.com/uploads/1/3/1/4/131409794/ferapibalojunu.pdf
    • http://xadixud.multiairfreight.com/uploads/1/3/1/4/131453540/komugikukejoxim-paruli-wazukinamojowo-jaditubulizodo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/7783/6703/files/lamir.pdf
    • https://cdn.shopify.com/s/files/1/0440/2351/3238/files/fijororisijabodulos.pdf
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/7243756769.pdf
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/jisabenus.pdf
    • https://cdn.shopify.com/s/files/1/0435/6263/1326/files/mathematical_logic_class_12.pdf
    • https://cdn.shopify.com/s/files/1/0444/7014/1095/files/biografia_de_bernardino_ramazzini.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/molukutozaruxavupemifin.pdf
    • https://cdn.shopify.com/s/files/1/0437/0821/9547/files/xoviniwevu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6158/3776/files/probability_distribution_formulas.pdf
    • https://cdn.shopify.com/s/files/1/0431/9199/2481/files/buku_biomassa.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_off00006530.bin
917ffe321eb7130fa44d749296fc0be300056561e2eab005e49b88859da8ace0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6530 4576 bytes
font_01_sfnt_off000074c4.bin
0dcb98ed11830554ae82e3617c1dbb59c6cfe5c75dcf6e5032866329e3892121
pdf-font-stream PDF embedded font (sfnt) at offset 0x74C4 10212 bytes
font_02_sfnt_off000097a7.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x97A7 4324 bytes