Malicious PDF — malware analysis report

Static analysis result for SHA-256 6de0d972b2476834…

MALICIOUS

PDF

45.3 KB Created: 2020-08-30 21:31:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 137f24e04379501ee784c358d79be650 SHA-1: e173968f2dec7020baaf90ba211a21fbf43a1487 SHA-256: 6de0d972b2476834dccfc70b6fa3cdaaf105e9492c4f7c305812538de4897787
154 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of embedded links, with one pointing to a known malicious redirector. The document body contains obfuscated text and multiple URLs, suggesting an attempt to manipulate search engine results or redirect users to malicious content. While no scripts were explicitly extracted, the nature of the link farm and redirector indicates a malicious intent, likely related to phishing or malware distribution.

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=ese+instante+de+felicidad+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1668/2663/files/26197380786.pdf
    • https://cdn.shopify.com/s/files/1/0432/7093/0600/files/nenererejikigulalojena.pdf
    • https://cdn.shopify.com/s/files/1/0437/5350/4917/files/bsc_part_2_physics_practical_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/0791/7729/files/34945464334.pdf
    • https://cdn.shopify.com/s/files/1/0440/4133/9045/files/vodofisajobejipisusigin.pdf
    • https://cdn.shopify.com/s/files/1/0434/3182/1473/files/negabozetemodep.pdf
    • https://cdn.shopify.com/s/files/1/0434/6875/0998/files/4343444335.pdf
    • https://cdn.shopify.com/s/files/1/0435/4513/3215/files/theological_dictionary_old_testament.pdf
    • https://cdn.shopify.com/s/files/1/0435/3146/8951/files/antenna_magus_crack.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/sample_diploma_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/6488/5402/files/dazovugud.pdf
    • https://cdn.shopify.com/s/files/1/0428/8145/0147/files/javascript_length_of_string.pdf
    • https://static.usrfiles.com/ugd/3e9e83_60dcfe4a40b0407589f3e0589f34778f.pdf
    • https://static.usrfiles.com/ugd/b8c837_42eccfa6e4cd4a4082202e7c8a726db6.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_off0000710c.bin
c98d53babf063f2cfeb83afef88b528b914736db375e81c8acb8cb30827cd678
pdf-font-stream PDF embedded font (sfnt) at offset 0x710C 5008 bytes
font_01_sfnt_off00008226.bin
6fb16ebfd6db1b02774cc97209e4dee56ec3863e68c69a15ad25db9fed8fd36b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8226 11096 bytes