Malicious PDF — malware analysis report

Static analysis result for SHA-256 1af0d97cdffe2c4e…

MALICIOUS

PDF

48.8 KB Created: 2020-08-31 11:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0819a886474af8bb2f29da434a5e4db6 SHA-1: 0fb1b86c5e9039d4a2a48092935bbcab087480d3 SHA-256: 1af0d97cdffe2c4e5b996693e4cc49029984bd569134fc321a625336da96976b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link that redirects to a known malicious domain, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to movie downloads and the malicious URL, suggesting a lure. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous other links, likely part of a link farm to improve search engine ranking for malicious 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/wix?keyword=frozen+720p+dual+audio+movie+download
    • https://cdn.shopify.com/s/files/1/0434/1458/5509/files/kabojewelamuvixubanizuv.pdf
    • https://cdn.shopify.com/s/files/1/0445/5134/0191/files/planet_minecraft_resource_packs.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4854/files/single_bed_size_sheets_uk.pdf
    • https://static.usrfiles.com/ugd/5899d5_94dcb89b397c476e84e35bfb8ee991fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_424092784b1441f19ed5e9047d8dc79f.pdf
    • https://cdn.shopify.com/s/files/1/0439/7914/5374/files/candy_box_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zutowujovepenatugipo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6756/2392/files/1828666455.pdf
    • https://cdn.shopify.com/s/files/1/0431/7223/3376/files/tatotonowela.pdf
    • https://static.usrfiles.com/ugd/64d889_e00b7c1f2f704360a08916087aecc036.pdf
    • https://static.usrfiles.com/ugd/b8c837_54b9d9deb186495c844334894d34d319.pdf
    • https://static.usrfiles.com/ugd/7603ae_8bc305813a614956bfcb945bf839ce6c.pdf
    • https://static.usrfiles.com/ugd/5ecadc_805ccffc608d49729d3118d3429e92e9.pdf
    • https://static.usrfiles.com/ugd/b8c837_60e58ff5224a480da5784657af1b4e42.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069bc.bin
51f6db16d50f6b55e9dc29f03ba5ba3c6cbaa21260fd684461c31ea840f67756
pdf-font-stream PDF embedded font (sfnt) at offset 0x69BC 5440 bytes
font_01_sfnt_off00007c3c.bin
1f756b46481ac718095810e133e155ec1caf818687d25c20e8b002f727d713c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C3C 2116 bytes
font_02_sfnt_off000085e8.bin
a4bf860add16f7e4a088adeafbc534343ed9b712975d9439ada1670881dee818
pdf-font-stream PDF embedded font (sfnt) at offset 0x85E8 15544 bytes