Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9ca50f92129fff5…

MALICIOUS

PDF

39.3 KB Created: 2020-08-31 09:19:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8283d277b763a2c79ec36f47dfe890a SHA-1: e10280a245357b73a806acae4243753e05deeac0 SHA-256: f9ca50f92129fff54eefe71b9d88a247ee38e29da495cc452aedfeaa476b117f
154 Risk Score

Malware Insights

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

The PDF document contains embedded links that lead to a malicious redirector, disguised as search results for a movie. The primary malicious URL identified is ttraff.ru, which is flagged as a known malicious redirector. The document body, though partially corrupted, contains the same lure text and URLs. The presence of numerous embedded links, many pointing to Shopify domains, suggests a link farm or SEO poisoning tactic to drive traffic to the malicious URL.

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=kyss+mig+pelicula+completa+en+espa%25C3%25B1ol+latino+online%253D
    • https://cdn.shopify.com/s/files/1/0434/7969/5517/files/zusujaleg.pdf
    • https://cdn.shopify.com/s/files/1/0436/8036/6745/files/how_to_move_pages_in_adobe_acrobat_pro.pdf
    • https://cdn.shopify.com/s/files/1/0434/5154/7815/files/purex_triton_nautilus_fns.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/chemistry_textbook_grade_10_12.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18983443830.pdf
    • https://cdn.shopify.com/s/files/1/0439/4126/5566/files/good_cv_template_word.pdf
    • https://cdn.shopify.com/s/files/1/0429/9302/5183/files/srtnme_kuvveti_9_snf.pdf
    • https://static.usrfiles.com/ugd/0286dd_d80cdcbc7d9b40499c09792bfa31c371.pdf
    • https://static.usrfiles.com/ugd/05900a_2069451aaa67409d9ac0f77f411c4d2e.pdf
    • https://static.usrfiles.com/ugd/69695d_b641e9aa547d4b7bb3f79c555ce2f2cb.pdf
    • https://static.usrfiles.com/ugd/2c8d66_ae0c4740e64e4e43ba4cb1e7b85e53f6.pdf
    • https://static.usrfiles.com/ugd/529dbf_20f6d69950bc4651b37810470c993547.pdf
    • https://cdn.shopify.com/s/files/1/0435/3038/7605/files/24471240517.pdf
    • https://cdn.shopify.com/s/files/1/0457/8636/6118/files/9644976985.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_off00005653.bin
b7c7fa1f853761004c519225a422a671da35445e9b528cb90ef610c9f618768d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5653 5488 bytes
font_01_sfnt_off000068bd.bin
9c7af2b05b29f898365e6784169ce376299d6404bb39d1a661f49a84fb08eed6
pdf-font-stream PDF embedded font (sfnt) at offset 0x68BD 11484 bytes