Malicious PDF — malware analysis report

Static analysis result for SHA-256 1939a09003861c5f…

MALICIOUS

PDF

45.0 KB Created: 2020-08-31 08:57:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef005ff5d0a50b9283515543b86aacbf SHA-1: edd3f27c78f73a397ea4d99323f8ef8b9280fedc SHA-256: 1939a09003861c5ff102a2e9adcd4a2c8582a31b13693bdc652ef194f729fccf
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with the primary link pointing to a known malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign, aiming to lure users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to redirect users to potentially harmful content.

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/wix?keyword=pathfinder+drake+companion+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/0a0016_cec25af157e34f229482596722e94068.pdf
    • https://static.usrfiles.com/ugd/55f640_4b1a0547e02c49f0bbc3931295159930.pdf
    • https://static.usrfiles.com/ugd/33a16d_bb7e9d25fe47483dad3e3bf49b22c847.pdf
    • https://static.usrfiles.com/ugd/d17951_5dd4ab2da4ac400eb7a68c49656bfa6b.pdf
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/43532932962.pdf
    • https://cdn.shopify.com/s/files/1/0433/7985/1414/files/pewef.pdf
    • https://cdn.shopify.com/s/files/1/0429/0379/7913/files/1000uf_capacitor_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/4392/9757/files/duwiperesutareji.pdf
    • https://cdn.shopify.com/s/files/1/0428/3075/8044/files/27817099039.pdf
    • https://cdn.shopify.com/s/files/1/0438/5469/2512/files/infarctus_splnique.pdf
    • https://cdn.shopify.com/s/files/1/0430/8320/2711/files/nakazozoxomu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9244/3303/files/astm_a106_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/xivajomadifezinezofuzu.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_off00007267.bin
49c827564fe4b9bcb982da9b08c091885d493022ffa400df49be7750a4012f95
pdf-font-stream PDF embedded font (sfnt) at offset 0x7267 5424 bytes
font_01_sfnt_off000084a6.bin
b197fdf92a2f7370ac2750926fde3cc02c81716f6868a71bb0cbf61748071a85
pdf-font-stream PDF embedded font (sfnt) at offset 0x84A6 10212 bytes