Malicious PDF — malware analysis report

Static analysis result for SHA-256 804edd063d264400…

MALICIOUS

PDF

32.2 KB Created: 2020-09-02 18:05:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5270e592a8de94fc8802357d2eebd00 SHA-1: 90937af060e01194b6f8919893b49f9d39dc0a88 SHA-256: 804edd063d264400d21388ab2decc1c68d069aa6a24e85998e7993c561f9a5f1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.link, which is likely used to direct users to malicious content. The document body, though heavily obfuscated, contains the same search query as the malicious URL, suggesting a lure. The PDF also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO link farm techniques used to improve search engine ranking for malicious sites.

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.link/wix?keyword=chokka+thangam+songs++masstamilan.+in
    • https://cdn.shopify.com/s/files/1/0436/4396/1504/files/neumonia_adultos.pdf
    • https://cdn.shopify.com/s/files/1/0457/3347/8566/files/common_factors_and_multiples_workshe.pdf
    • https://cdn.shopify.com/s/files/1/0433/9243/4343/files/vovodizedovup.pdf
    • https://cdn.shopify.com/s/files/1/0435/2930/6272/files/aicpa_code_of_professional_conduct.pdf
    • https://static.usrfiles.com/ugd/eed56f_11afedc1c02b4251844d0dc3fc9e0f2c.pdf
    • https://cdn.shopify.com/s/files/1/0431/4542/9160/files/create_watermark_online.pdf
    • https://cdn.shopify.com/s/files/1/0437/8879/6065/files/16434809609.pdf
    • https://cdn.shopify.com/s/files/1/0429/8850/3203/files/jopedinipekivomini.pdf
    • https://cdn.shopify.com/s/files/1/0432/3262/4797/files/vupomiwegimisugigesonetoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/5214/5560/files/30335678121.pdf
    • https://cdn.shopify.com/s/files/1/0430/1111/3123/files/kenmore_water_softner_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/2658/6527/files/antara_ibn_shaddad.pdf
    • https://cdn.shopify.com/s/files/1/0431/8022/8759/files/wisifuw.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_off000042c4.bin
befe54724e2a674b91dba22896372f26c1a8af88ef3f73e6811e8dabdeb252fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x42C4 5004 bytes
font_01_sfnt_off000053a3.bin
b2101bede42205949daa35fe5c03e11c66e08c465e48953d04faff76fca92394
pdf-font-stream PDF embedded font (sfnt) at offset 0x53A3 9640 bytes