Malicious PDF — malware analysis report

Static analysis result for SHA-256 b259fe6b21c5e3a7…

MALICIOUS

PDF

37.6 KB Created: 2020-08-19 05:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edcecc7af83b5b85c91e41ef6ff15dff SHA-1: aeba18115edaa0a5233b9de56652fecc0ccf5661 SHA-256: b259fe6b21c5e3a787885ef7db647bf29ac3b831e99d87d12de9234848225c81
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary redirector URL being `https://ttraff.cc/pify?keyword=bounce+tales++for+jio+phone`. This heuristic firing indicates a link farm designed to redirect users to malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=bounce+tales++for+jio+phone
    • http://jizidovo.ridewithus.com.au/uploads/1/3/1/4/131407424/jekufukewolig.pdf
    • http://files.lightshapesphotography.com/uploads/1/3/2/7/132740498/mojiwupetaxelof_talujafefil_wemofarudimow_xagafew.pdf
    • https://cdn.shopify.com/s/files/1/0429/3689/3599/files/canon_digital_photo_professional_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0438/9906/0376/files/65821659397.pdf
    • https://cdn.shopify.com/s/files/1/0429/7241/4106/files/88733436640.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/acute_pancreatitis_scoring_systems.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/nuvalire.pdf
    • https://cdn.shopify.com/s/files/1/0435/5047/4399/files/paracetamol_mechanism_of_action_applications_and_safety_concern.pdf
    • https://cdn.shopify.com/s/files/1/0434/6147/6504/files/wogosor.pdf
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/55896800943.pdf
    • https://cdn.shopify.com/s/files/1/0438/1592/7965/files/376805737.pdf
    • https://cdn.shopify.com/s/files/1/0435/0096/1947/files/basic_concepts_of_topology.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/papizewosapifipuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9760/files/ielts_academic_reading_samples_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/6713/6413/files/adobe_reader_for_windows_7_64_bit_free_download.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_off0000555c.bin
bd47e02e61ab70c5afe95dc4564d0929f94275954e5987207190b901e4a4d30e
pdf-font-stream PDF embedded font (sfnt) at offset 0x555C 5228 bytes
font_01_sfnt_off00006725.bin
fb22e1676d34135b6ddbd0fd5ad08fb04b61ffb721de809f09df3aacff37524e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6725 10184 bytes