Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bbaa8591b547145…

MALICIOUS

PDF

41.8 KB Created: 2020-08-08 03:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0cd1d629e62ffc07f74e6fdb9f692276 SHA-1: f7d4b78546a01c6012065d7b19bf882ee3db94f3 SHA-256: 5bbaa8591b5471457906c435f1befaec4b50c885cf256f734ac401ae3030ee97
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to learning Japanese and references to the URLs, reinforcing the lure. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent.

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=learn+japanese+for+beginners+pdf
    • http://files.romebylocalstours.com/uploads/1/3/1/4/131483154/3091126.pdf
    • http://sezapoj.thebrainydeafsite.com/uploads/1/3/2/7/132740435/2f7fff8e0d7.pdf
    • http://files.rqgenesis.co/uploads/1/3/2/6/132695746/7769046.pdf
    • http://jixomeb.lifeaftersemicolons.com/uploads/1/3/0/7/130776760/tagevawisifevizi.pdf
    • http://files.mrscorleysclassroom.com/uploads/1/3/2/6/132680808/fuwuzumux.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3781/0075/files/14990282944.pdf
    • https://cdn.shopify.com/s/files/1/0434/1402/8450/files/13088771745.pdf
    • https://cdn.shopify.com/s/files/1/0448/7554/6791/files/christmas_carols_dickens.pdf
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/baha_u_llah_and_the_new_era.pdf
    • https://cdn.shopify.com/s/files/1/0428/9862/0569/files/24536401274.pdf
    • https://cdn.shopify.com/s/files/1/0436/1905/7822/files/fuminogajep.pdf
    • https://cdn.shopify.com/s/files/1/0433/9639/9265/files/73312703201.pdf
    • https://cdn.shopify.com/s/files/1/0437/1218/4474/files/24979394936.pdf
    • https://cdn.shopify.com/s/files/1/0436/4910/6073/files/16807191449.pdf
    • https://cdn.shopify.com/s/files/1/0430/5833/1799/files/pimupususufofojubozadukur.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/ielts_speaking_2020_makkar.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006653.bin
67dfa9153b77c654922b5dafe4a8226dd91cc30ea610d3540d957aed3ba7dd66
pdf-font-stream PDF embedded font (sfnt) at offset 0x6653 5332 bytes
font_01_sfnt_off00007886.bin
cce0e0c5b31fdc9c4e92606239b2d223d7686cae2b41ca2281eb85782c67007b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7886 9964 bytes