Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b12c079673354b7…

MALICIOUS

PDF

52.2 KB Created: 2020-08-08 10:07:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b20454326e3d1f6fc4912e508d851d51 SHA-1: 49f0874fd82fc4dd4f02c38948c8589ebbf7aff8 SHA-256: 6b12c079673354b72d3d2c5b73ef2e342a97c5b7dfbfd0e0660e0f337d37687d
174 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to a redirector infrastructure, indicating a link farm or phishing attempt. The document impersonates a cloud document sharing service, attempting to trick the user into clicking on these malicious links. The embedded URL 'https://ttraff.com/pify?keyword=android+studio+tutorial+for+beginners+with+examples+pdf' is a primary indicator of malicious intent, likely leading to a further stage of attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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=android+studio+tutorial+for+beginners+with+examples+pdf
    • http://zotefer.caltempmissionb.org/uploads/1/3/0/7/130738799/813252.pdf
    • http://files.creativeiceskating.com/uploads/1/3/0/7/130739809/saxadexokoxog.pdf
    • http://files.anglia.nl/uploads/1/3/0/9/130969421/rarininutojit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jakenetukuzalavat.pdf
    • https://cdn.shopify.com/s/files/1/0428/1260/4582/files/41265671389.pdf
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/albendazole_vs_mebendazole.pdf
    • https://cdn.shopify.com/s/files/1/0435/8782/9928/files/kejokudufubopozopomiso.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81274949660.pdf
    • https://cdn.shopify.com/s/files/1/0432/8515/1897/files/article_35a_kashmir.pdf
    • https://cdn.shopify.com/s/files/1/0438/8644/4696/files/bulleh_shah_biography.pdf
    • https://cdn.shopify.com/s/files/1/0432/8207/1716/files/1972_gmc_jimmy.pdf
    • https://cdn.shopify.com/s/files/1/0429/2762/0249/files/54730832537.pdf
    • https://cdn.shopify.com/s/files/1/0438/9008/1944/files/femobodakugedes.pdf
    • https://cdn.shopify.com/s/files/1/0437/3767/7989/files/90448606809.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_off00008bfd.bin
c34c14903d7e28302b62c6d7f280a7178d56e1fae26a10c6283a1ff95ee911c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BFD 5744 bytes
font_01_sfnt_off00009f75.bin
8d799fa43ae9dd24e9ead8290462571d27d1887ffb577c1f98cb834bef3269e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F75 10616 bytes

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