Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3e1cfa1fe268138…

MALICIOUS

PDF

55.2 KB Created: 2020-08-17 01:41:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9daf689545a9e4b925550fb496271263 SHA-1: b80f98fa69f032ab87095ff0c8b7890040c7dbdf SHA-256: c3e1cfa1fe2681381b05fcf5f6c75920746cf2e47034caa7f1962c28aa2f73f0
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a link to "SAP B1 certification questions and answers". The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and the ML classifier also flagged it as malicious. The document body and embedded links suggest a SEO-based link farm designed to drive traffic to malicious infrastructure.

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=sap+b1+certification+questions+and+answers+pdf
    • http://files.cyclingadventures.net/uploads/1/3/2/6/132695689/sulexovabub_bubizelogu_mekodovi_pinuvawenun.pdf
    • https://cdn.shopify.com/s/files/1/0428/6991/5814/files/suwotetakemukesopofar.pdf
    • https://cdn.shopify.com/s/files/1/0431/0332/2261/files/gejala_bronkiektasis.pdf
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/nujuzixilatenigex.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/sekonic_l-_358_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/7073/2950/files/www_dpe_gov_bd_result_2020.pdf
    • https://cdn.shopify.com/s/files/1/0455/3906/6021/files/advancing_access_enrollment_form.pdf
    • https://cdn.shopify.com/s/files/1/0435/0260/0356/files/20719866362.pdf
    • https://cdn.shopify.com/s/files/1/0436/0319/8114/files/adjacent_channel_interference_in_mobile_communication.pdf
    • https://cdn.shopify.com/s/files/1/0429/6815/4278/files/johndee_snow_central.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/befuxasu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0313/4627/files/xevugodidukilupele.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_off0000984e.bin
b7a3f4cede3d2779861ffdc7a3f631d168d70af5fa5e7bb3b746341741b1ce6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x984E 5628 bytes
font_01_sfnt_off0000ab8f.bin
c27341b3bdf1abeeaec6be5363f7c8c433c8968372b57f23580aa9575da7131a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB8F 10824 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.