Malicious PDF — malware analysis report

Static analysis result for SHA-256 7900ea1eb250d417…

MALICIOUS

PDF

39.7 KB Created: 2020-09-11 22:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00583f665901619ba9465af5ec611ba9 SHA-1: 4c30f61589ccc54000d819f7ba8629576614b850 SHA-256: 7900ea1eb250d417b84b0c990704a5820444fc740d8e7076f314ea08ffca0672
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to host malicious content. One prominent link, 'https://ttraff.cc/pify?keyword=adverb+worksheet+for+class+3+with+answers', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify links, suggesting a lure to download or access malicious content disguised as educational material.

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.cc/pify?keyword=adverb+worksheet+for+class+3+with+answers
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0443/5532/2012/files/bemikumusiguxelejofaba.pdf
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/line_graph_template_ielts.pdf
    • https://cdn.shopify.com/s/files/1/0434/6668/6629/files/94262951625.pdf
    • https://cdn.shopify.com/s/files/1/0427/7351/2359/files/11354566060.pdf
    • https://static.usrfiles.com/ugd/32acb1_692a4db8d21b45109e7bdc70dba0b441.pdf
    • https://static.usrfiles.com/ugd/ab922d_453051121ebc49d692f0e2e36db418d4.pdf
    • https://cdn.shopify.com/s/files/1/0431/0954/8188/files/pugulisilosusimenos.pdf
    • https://cdn.shopify.com/s/files/1/0431/9045/2387/files/80377410831.pdf
    • https://cdn.shopify.com/s/files/1/0432/1135/8369/files/speak_now_booklet.pdf
    • https://cdn.shopify.com/s/files/1/0434/2474/3591/files/97778957696.pdf
    • https://cdn.shopify.com/s/files/1/0440/8344/5925/files/crimes_of_the_heart_beth_henley.pdf
    • https://cdn.shopify.com/s/files/1/0437/5478/2869/files/vakamitaduzetop.pdf
    • https://cdn.shopify.com/s/files/1/0431/0581/2629/files/present_simple_vs_present_continuous_exercises_upper_intermediate.pdf
    • https://cdn.shopify.com/s/files/1/0448/3615/9645/files/safutizajagop.pdf
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/61345978036.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_off00005cbe.bin
47b688b6a6b531853a148b70cc4e126c22f56e5b7e5929546cf0562a4b927865		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CBE 5616 bytes
font_01_sfnt_off00006ff0.bin
fd67c7953b4489a182567bdbc1f91f6ac02e3b93e4d3b417e3db7a985bbf7284		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF0 9908 bytes

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