Malicious PDF — malware analysis report

Static analysis result for SHA-256 147d3c59fd0caeb2…

MALICIOUS

PDF

39.9 KB Created: 2020-09-19 08:40:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9cc809b1e2ae110b4b51857833cf073 SHA-1: 8d1e1c07b4c39b8e90bb8697f17e433587af3d68 SHA-256: 147d3c59fd0caeb2589e408e240b95e0a9cc462c23960607faced4f302053277
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, likely as part of an SEO link farm. One critical heuristic indicates a malicious redirector URL, https://ttraff.me/wix?keyword=perdona+quiero+casarme+contigo+pdf, which is the primary indicator of malicious intent. The document body contains garbled text but also includes the malicious URL and references to PDF files, suggesting a lure to external content. No scripts were extracted, but the presence of embedded URLs and the malicious redirector points to a phishing or redirection attempt.

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.me/wix?keyword=perdona+quiero+casarme+contigo+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4016/9366/files/pickup_trucks_with_manual_transmission.pdf
    • https://cdn.shopify.com/s/files/1/0432/4530/6011/files/c_serialize_object_to_xml.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/xamaxivez.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5015/files/event_feedback_form_template_excel.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/tivejap.pdf
    • https://cdn.shopify.com/s/files/1/0466/2650/4869/files/mumovojujewitokesinena.pdf
    • https://cdn.shopify.com/s/files/1/0437/2781/4805/files/movie_hd_apk_fire_tv.pdf
    • https://cdn.shopify.com/s/files/1/0437/4344/5141/files/zesatiguzibibimevem.pdf
    • https://cdn.shopify.com/s/files/1/0436/6001/7814/files/canon_pixma_mg3650_instruction_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1065/files/naziwupapisudurosazovamis.pdf
    • https://cdn.shopify.com/s/files/1/0429/0609/1673/files/71816911548.pdf
    • https://91b2ff81-8355-467a-a40b-2d5554e34e84.filesusr.com/ugd/83e584_061953494f8d4675b12502b3d6239c66.pdf?index=true
    • https://a4c5415e-d22a-4461-83df-929e10b39aee.filesusr.com/ugd/6f58fb_27573a7db58e40dbb52cfb03e1c54c7c.pdf?index=true
    • https://356118f4-ffbc-476f-b80c-08fd7fd12c35.filesusr.com/ugd/8ac1ab_19def2f064d1435c992448aa7fb245ee.pdf?index=true
    • 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_off0000591c.bin
3fa4ff0b5f24c307a862a1ef78e49cd4b5f0dfdc902e52651e41bb1ea0fda5a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x591C 5572 bytes
font_01_sfnt_off00006bf2.bin
ccc58b29a9604ff30b7e9272f38deb586436e0386ec91fe7e4f2ce7478822054		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF2 11308 bytes

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