Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eff35fd08eff1d2…

MALICIOUS

PDF

61.5 KB Created: 2020-08-07 21:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7ed99172f07ef7b7424749faa6c292d SHA-1: 585860ef868cf7a3cea46ddb5a76a31433214603 SHA-256: 4eff35fd08eff1d268629f9b23337dc3dc2d535026a1ce981a4faf0949b507dc
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting the PDF's primary purpose is to redirect the user to potentially harmful content.

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=complica%25C3%25A7%25C3%25B5es+da+cirrose+hep%25C3%25A1tica+pdf
    • http://lugetosud.jonclausart.com/uploads/1/3/1/3/131379732/90e783ea7.pdf
    • http://files.lessons-by-alex.com/uploads/1/3/0/7/130775063/genupaxeju-zoxefejinezuvo-gezepabafelar-kifikiji.pdf
    • http://files.phillyseaperch.org/uploads/1/3/1/4/131483110/6225938e6a6e.pdf
    • http://jepexowe.picassofaceandbodypainter.com/uploads/1/3/0/8/130873826/sanujanafepenapimose.pdf
    • http://files.eakarts.com/uploads/1/3/0/7/130740073/6874331.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/magobusiriwolozun.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/kesupo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/44855298062.pdf
    • https://cdn.shopify.com/s/files/1/0432/3590/1602/files/mojivetagobubuwepeluv.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/zimofonuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8514/files/xanezumaregorerotepi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/a_woman_of_no_importance.pdf
    • https://cdn.shopify.com/s/files/1/0433/5095/0041/files/26359142640.pdf
    • https://cdn.shopify.com/s/files/1/0434/4889/3606/files/cisco_wireless_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/arihant_analytical_logical_reasoning_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/2908/6876/files/76971220118.pdf
    • https://cdn.shopify.com/s/files/1/0434/2166/3397/files/java_tutorial_for_selenium.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/rubowuzasela.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008572.bin
4e75ade670b2169dc79de0dd021fccc90225278c3ab1fa051b263fcb639c09e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8572 6416 bytes
font_01_sfnt_off0000953d.bin
819be5ebf52a46621ed75b42142217afc52e48f4b82a76a87507e3ccf6455379		 pdf-font-stream PDF embedded font (sfnt) at offset 0x953D 5936 bytes
font_02_sfnt_off0000a825.bin
afb28440fe96e925ef8e15f3cfdf10dce4ab9e7b9423e4c94fd3858bc67d9283		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA825 12924 bytes
font_03_sfnt_off0000cf78.bin
3f0697ef8e4f4be2776c3d80cc7271a2ede5a91d1c4cfe99ebc2d6beac97faf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF78 16400 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.