Malicious PDF — malware analysis report

Static analysis result for SHA-256 92ce8514056aa503…

MALICIOUS

PDF

47.8 KB Created: 2020-08-17 11:29:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c12ec9eb6bbbd0be84fe350ce8b63e4a SHA-1: 1928f1cb06648c8989080836bc980e2b9365bf06 SHA-256: 92ce8514056aa503a32a9c19891ecb9c35bd9512a7c3780f43209231559b1b44
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'job guide'. The ML classifier strongly flagged this PDF as malicious. The presence of numerous external PDF links suggests a link farm or redirection strategy to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=insanity+flyff+job+guide
    • http://files.thenauticalartsworkshop.com/uploads/1/3/1/6/131606035/bikebawifutir.pdf
    • http://miwofeku.rehabcapetown.com/uploads/1/3/2/7/132712615/fagerojonabepopofalo.pdf
    • http://files.eternal-acupuncture.com/uploads/1/3/1/8/131858747/4310648.pdf
    • http://files.condzellasfarm.com/uploads/1/3/0/9/130969555/97c8dd5b0b0479.pdf
    • http://files.pof-addcallsettings.com/uploads/1/3/1/8/131856372/86c46a1716d860f.pdf
    • https://cdn.shopify.com/s/files/1/0453/8466/3208/files/crs_uk_reporting_dormant_account.pdf
    • https://cdn.shopify.com/s/files/1/0429/2260/6759/files/48696529345.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/arma_3_tanoa_map.pdf
    • https://cdn.shopify.com/s/files/1/0432/0795/0495/files/usps_certified_mail_tracking_number_format.pdf
    • https://cdn.shopify.com/s/files/1/0429/1995/2550/files/normas_de_dibujo_arquitectonico.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefiwi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/android_sqlite_alter_table_add_column_after.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/zaparaliw.pdf
    • https://cdn.shopify.com/s/files/1/0430/4204/6103/files/jopifopalopenoro.pdf
    • https://cdn.shopify.com/s/files/1/0432/7197/9172/files/33497010832.pdf
    • https://cdn.shopify.com/s/files/1/0437/7555/7793/files/dafamuvakowexaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/7086/6076/files/xonaminatowuson.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wemulaw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ed8.bin
fb8130befe4ff0d95141b190c1fb55291505a6000073618f0e3d728f7cebe0a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED8 5116 bytes
font_01_sfnt_off00008055.bin
56c48457a707d3d430d610ddfec50676f6ee70b29895af6727634c5a46dd022a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8055 10360 bytes
font_02_sfnt_off0000a3b5.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA3B5 4324 bytes