Malicious PDF — malware analysis report

Static analysis result for SHA-256 1255fc49001635f1…

MALICIOUS

PDF

58.0 KB Created: 2020-08-23 01:13:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abb663b45d9faa30aed583b90f5b776c SHA-1: afd0a9c890c298caa69896d22eb20395c3e97aa0 SHA-256: 1255fc49001635f15bdff4e2b04bf0b7a8e30e797ee98a596d500849acdcf1bc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.com/pify?keyword=blend+s+opening+song. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous links to external PDF files, many of which are hosted on Shopify. The document body, though heavily obfuscated, contains the malicious redirector URL and references to other PDF files, suggesting a lure to external content. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=blend+s+opening+song
    • http://files.stlcreativelandscapes.com/uploads/1/3/0/8/130813650/ff278834.pdf
    • http://files.eceprek.com/uploads/1/3/2/8/132814050/9665404.pdf
    • http://bivijile.msmorales-chemistry411.com/uploads/1/3/1/1/131163729/5008513.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/zumurelab.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/sipirerizoj.pdf
    • https://cdn.shopify.com/s/files/1/0437/3089/4999/files/gudujiwab.pdf
    • https://cdn.shopify.com/s/files/1/0438/0160/8353/files/balloonist_sf_font_free.pdf
    • https://cdn.shopify.com/s/files/1/0451/2792/5925/files/medical_laboratory_technology_books_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/0913/9111/files/neropenafurerusisaleni.pdf
    • https://cdn.shopify.com/s/files/1/0438/1710/7618/files/suserusixuvo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5425/9606/files/bnfices_non_commerciaux.pdf
    • https://cdn.shopify.com/s/files/1/0433/4331/5102/files/kobalese.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006795.bin
3592cc9ece467c3ed99c2d023f4240061ee1b066f83795105ffb3b4b0dcf24d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6795 9088 bytes
font_01_sfnt_off000085f7.bin
b6322c795324efa11a7257ff90e6c9511354cc5a7ea58d37b687785b50aa2982		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85F7 4868 bytes
font_02_sfnt_off000096a3.bin
0e0b446efc513665b611aa363921401cea5fbaab1d6685052e19f5596f06d754		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96A3 14432 bytes
font_03_sfnt_off0000c407.bin
2624567f02531c60028a8a759855cc804cc712c887ff47829cc0454dcb65c1a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC407 16552 bytes

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