Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdc19161736d0182…

MALICIOUS

PDF

46.5 KB Created: 2020-08-25 14:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39d5b8a562f276383fd8ae9ee84a17c2 SHA-1: 46b9e302fcadd201bb590e22247bf4dd1298a364 SHA-256: fdc19161736d018221f9247b09f35ff486e2b37fd6d13e9a446704a6ad3f59b6
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a link farm, indicating an attempt to direct users to malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'mr bean animated episodes free' and a URL that appears to be part of a SEO link farm strategy. The primary malicious URL identified is https://ttraff.cc/pify?keyword=mr+bean+animated+episodes+free, which is likely used to redirect users to a phishing or malware distribution site.

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=mr+bean+animated+episodes+free
    • http://wetazugu.covenantfarmheals.org/uploads/1/3/0/7/130776886/1087997.pdf
    • https://cdn.shopify.com/s/files/1/0432/4678/0566/files/65194133875.pdf
    • https://cdn.shopify.com/s/files/1/0428/4894/4284/files/joruguporevalixub.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/gogowoxibuzipudedebemenez.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/99430105835.pdf
    • https://cdn.shopify.com/s/files/1/0437/6579/2929/files/rubeter.pdf
    • https://cdn.shopify.com/s/files/1/0464/6171/4584/files/nuxexokudirekogav.pdf
    • https://cdn.shopify.com/s/files/1/0428/2574/4547/files/wigisukubebamobipovufuja.pdf
    • https://cdn.shopify.com/s/files/1/0439/9264/5790/files/aws_cloud_practitioner_certification_questions.pdf
    • https://cdn.shopify.com/s/files/1/0436/6457/2569/files/rosexibe.pdf
    • https://cdn.shopify.com/s/files/1/0429/9918/5561/files/bass_booster_equalizer_pc.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/embedded_linux_booting_process.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007809.bin
99e5a9f177706884cc40d4590ed6b75d0f6ccb173f0f29823be0254beea5519c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7809 5300 bytes
font_01_sfnt_off000089f3.bin
b5d3833369f08bf287a2e252be8785abab2c074f1df326ecdf6bfc8f14eb99e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x89F3 10420 bytes