Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b4b3d281ebfa23f…

MALICIOUS

PDF

40.9 KB Created: 2020-08-15 01:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d09d9c1873de5b88ceb903ae9ddfaba3 SHA-1: 4d54d7341133048af2c95841581d52f32de7c07c SHA-256: 2b4b3d281ebfa23fc3dfb551e9158aba31dbc232d73879f2311d63dc9e5ee5bb
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'https://ttraff.ru/wb?keyword=lowrance%20hds%2012%20touch%20manual'. Another critical heuristic identified a PDF link farm, with many links pointing to Shopify domains, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier 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.ru/wb?keyword=lowrance%20hds%2012%20touch%20manual
    • http://files.millcreekroofingtx.com/uploads/1/3/1/0/131070231/pavusizuw.pdf
    • http://motapevag.southfloridabaza.org/uploads/1/3/1/6/131636664/50a1f94e.pdf
    • http://files.teamrehab.uk/uploads/1/3/1/4/131407849/fogasulobebetokibu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/balidibazazumubovusit.pdf
    • https://cdn.shopify.com/s/files/1/0429/3525/5203/files/write_source_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/6028/0982/files/ano_ang_kultura.pdf
    • https://cdn.shopify.com/s/files/1/0434/9411/3446/files/hi_ho_b_rogers.pdf
    • https://cdn.shopify.com/s/files/1/0430/9732/5732/files/kinetic_and_potential_energy_worksheet_energy_transfer.pdf
    • https://cdn.shopify.com/s/files/1/0429/6382/8895/files/76231820738.pdf
    • https://cdn.shopify.com/s/files/1/0433/8001/5262/files/lofijejobekawanubasezas.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/nasunezirig.pdf
    • https://cdn.shopify.com/s/files/1/0440/3865/2069/files/taxijejirapotanof.pdf
    • https://cdn.shopify.com/s/files/1/0438/3513/0018/files/56966633256.pdf
    • https://cdn.shopify.com/s/files/1/0428/8105/6931/files/rewiziwapuzejerina.pdf
    • https://cdn.shopify.com/s/files/1/0432/6647/4139/files/wujuzi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dedijadexurusefux.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_off000061c8.bin
2676e83aa528b8d43204a56c312d3ac12592764c39dbdbccbd08e0906b624eac
pdf-font-stream PDF embedded font (sfnt) at offset 0x61C8 5396 bytes
font_01_sfnt_off00007403.bin
a3b58e99db3fe843ffdbf46c5f5482942bde2fe561778647f7b335a4a3712452
pdf-font-stream PDF embedded font (sfnt) at offset 0x7403 10128 bytes