Malicious PDF — malware analysis report

Static analysis result for SHA-256 234d923ece2312d0…

MALICIOUS

PDF

123.2 KB Created: 2020-08-08 01:19:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19f5f84d8554adb436f696110f717857 SHA-1: 68b64480d8de5a7450ef2ec2df03b217e3785891 SHA-256: 234d923ece2312d0b33d743afffef753bd29a8e5c502e1f9877e99bce2cfa11a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector at 'https://ttraff.com/pify?keyword=sir+philip+sidney+astrophel+and+stella+pdf'. This suggests the document's primary purpose is to lure users to malicious sites. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=sir+philip+sidney+astrophel+and+stella+pdf
    • http://nukefire.onceuponastitchboutique.com/uploads/1/3/2/6/132681670/6613300.pdf
    • http://vixat.brmerch.shop/uploads/1/3/0/8/130873804/250320.pdf
    • http://kewilojil.dougpurnellart.com/uploads/1/3/0/7/130740178/33cf2.pdf
    • http://fapenu.sallyporteous.com/uploads/1/3/2/3/132302780/984f3.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/14895498994.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/82595467958.pdf
    • https://cdn.shopify.com/s/files/1/0434/2048/3751/files/sisisex.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/unity_debug_log.pdf
    • https://cdn.shopify.com/s/files/1/0434/3247/6838/files/58793723172.pdf
    • https://cdn.shopify.com/s/files/1/0432/9714/4990/files/gilurivuzitemumivosuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/introduction_to_sociology_and_anthropology_by_palispis.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/39424575008.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3584/files/onan_generator_4000.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voriwatovetizejewadodo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7064/3614/files/iobit_uninstaller_8._5_key.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_off0001a825.bin
e6f929d10a838f7221115ae7469ebdf340a134d104874eaa8257473ec1a76c8b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A825 5332 bytes
font_01_sfnt_off0001ba48.bin
8cac5efdcf9c74bea1650fa54818e89943d2386abbe0b495e37949a21e6d83b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x1BA48 10728 bytes