Malicious PDF — malware analysis report

Static analysis result for SHA-256 0617a853ab4ba315…

MALICIOUS

PDF

46.8 KB Created: 2020-08-30 10:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db570a4bc2b548b55af721464d92e7cf SHA-1: a6d5b19b38f3d62db42089b995bda299f73ea8fd SHA-256: 0617a853ab4ba315eb380ab1c24649ced9c460b9851774ccb1f3c25544dc26e4
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector. The document body contains garbled text but also includes the malicious URL, suggesting an attempt to disguise or embed it. The presence of numerous links and a malicious redirector indicates a likely phishing or malware distribution attempt.

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=conectores+logicos+en+ingles+y+espa%2525
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8670/7876/files/explosion_png_video.pdf
    • https://cdn.shopify.com/s/files/1/0435/5555/3432/files/cancel_avast_subscriptions.pdf
    • https://cdn.shopify.com/s/files/1/0451/7930/6135/files/mazuwukebipubavume.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf85d2d082af469d8735312db3fb9416.pdf
    • https://static.usrfiles.com/ugd/b8c837_cff675cc254f44c1bde6a67e3e295c02.pdf
    • https://static.usrfiles.com/ugd/05900a_bf48a0a685654a57977ae82fa1b25166.pdf
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/market_guide_for_asset_performance_management.pdf
    • https://cdn.shopify.com/s/files/1/0433/3646/6590/files/the_tempest_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/6970/1280/files/annamayya_keerthanalu_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0447/9415/1061/files/oxford_law_dictionary_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/9103/3250/files/28094446483.pdf
    • https://cdn.shopify.com/s/files/1/0432/1542/1599/files/tewopubipalavojeraj.pdf
    • https://cdn.shopify.com/s/files/1/0436/9835/6392/files/xowuzimipimugapejir.pdf
    • https://cdn.shopify.com/s/files/1/0432/0860/5859/files/free_responsive_ecommerce_shop_bootstrap_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/9375/2997/files/42838724444.pdf
    • https://cdn.shopify.com/s/files/1/0432/2230/2888/files/96705055660.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c88.bin
d1b7023e8c9150bfdf97dec9d0404c776b082d6eb52e0f7e1fbead524180c6d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C88 5344 bytes
font_01_sfnt_off00007eaa.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EAA 1800 bytes
font_02_sfnt_off00008738.bin
41424d0b0ab3fa57bafb73a5c367a07125b0a6538487059ca5e1b2b03d34290e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8738 11532 bytes

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