Malicious PDF — malware analysis report

Static analysis result for SHA-256 02ce3d859f100fb3…

MALICIOUS

PDF

55.5 KB Created: 2020-08-12 13:11:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8befd65147054f1b401eac2b1c5490f1 SHA-1: 65ae740dec4715931ff00fe670384f865cd10d8f SHA-256: 02ce3d859f100fb3ce3b29877d0259058710029bb51d30bb0f1d96f10e3583a9
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to guitar lessons, and the presence of many external PDF links points towards SEO manipulation or a link farm tactic. The ML classifier strongly indicated maliciousness, supporting the presence of malicious content within the PDF.

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/pify?keyword=aula+inicial+de+viol%25C3%25A3o+pdf
    • http://files.sahalieherbals.com/uploads/1/3/1/4/131408928/vudixedavinita_zenazitekuz_kekud_rizatap.pdf
    • http://files.jmsupplyga.com/uploads/1/3/1/6/131637853/3808439.pdf
    • http://files.swwsupplies.com/uploads/1/3/1/0/131070452/4649161.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2318/7618/files/kagefubu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7218/2689/files/advantages_of_online_advertising.pdf
    • https://cdn.shopify.com/s/files/1/0437/5596/2522/files/safiwepojonexetowaloxerot.pdf
    • https://cdn.shopify.com/s/files/1/0434/5338/2822/files/www.towordconverter._net_en_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0433/4623/1449/files/creative_problem_solving_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0448/0640/6295/files/21710414259.pdf
    • https://cdn.shopify.com/s/files/1/0429/6923/5619/files/magemopewo.pdf
    • https://cdn.shopify.com/s/files/1/0446/6376/7203/files/british_english_grammar_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/9330/2178/files/19597741281.pdf
    • https://cdn.shopify.com/s/files/1/0429/6710/5687/files/rifelanomolanizilo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000804a.bin
e03483a19deb93ff60e3a4f2899d43e501b378570c5dd3499ee2450532026bee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x804A 5244 bytes
font_01_sfnt_off0000919e.bin
df7f3a18f3a8426c92df1b28e85c0eda75005380f8cee44dadd1fbfbcab4c42d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x919E 12932 bytes
font_02_sfnt_off0000b90c.bin
440b159d14de00d868b99d07762b2ca59c30c403935a56db5d29518140bfea0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB90C 16304 bytes

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