Malicious PDF — malware analysis report

Static analysis result for SHA-256 59a0a080d79ef4ef…

MALICIOUS

PDF

47.0 KB Created: 2020-08-22 13:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2870c0033a7c038363b7dc3b931d114d SHA-1: edcc99e14b45a600b06e167ffa7daa7bb0c4c8e8 SHA-256: 59a0a080d79ef4ef219ce013a7fbe2f1a2a75f83b3a463e6e5e8fb06a1d2a145
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to credit reports and the malicious URL. The primary malicious link identified is https://ttraff.com/pify?keyword=reporte+de+buro+de+credito+especial+empresas, which is likely used to redirect the user to a malicious site or download further payloads.

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=reporte+de+buro+de+credito+especial+empresas
    • http://files.atayloredapproach.com/uploads/1/3/2/6/132681213/gopibedez_bapimar_josotitujotak.pdf
    • http://files.kpuhra.com/uploads/1/3/1/6/131637224/323866.pdf
    • http://nobamu.mymindfulconnections.com/uploads/1/3/1/0/131070420/minifapekuxanu.pdf
    • http://files.billsnwphoto232.org/uploads/1/3/1/3/131381288/217a8ddca7a2.pdf
    • http://files.kellyharkinsdesigns.com/uploads/1/3/1/8/131856039/tanifatexoziwo_kowaxososenezi_napelibapuda.pdf
    • https://cdn.shopify.com/s/files/1/0431/0348/6103/files/insert_file_as_icon_in_word.pdf
    • https://cdn.shopify.com/s/files/1/0436/8911/5801/files/puregodujiwe.pdf
    • https://cdn.shopify.com/s/files/1/0437/3698/9850/files/wumumisuxedipidelinax.pdf
    • https://cdn.shopify.com/s/files/1/0436/2970/7422/files/multi_attribute_utility_theory.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3345/files/hong_kong_visa_application_form_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0430/4365/1741/files/33484037309.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/994400056.pdf
    • https://cdn.shopify.com/s/files/1/0439/7151/0430/files/child_diagnostic_assessment_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/6153/3085/files/dave_barry_guide_to_guys_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/8178/4734/files/muzafiwibovej.pdf
    • https://cdn.shopify.com/s/files/1/0432/5015/5688/files/54973397839.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/gozitekikiwowifej.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_off0000774b.bin
243a3247cbb8203f7508c9861e66963dd486551d0266101081f4a3ed54d6e4eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x774B 5364 bytes
font_01_sfnt_off0000896c.bin
e8ad1e63010279656adbd18ec2ab294709d8b37cff0326e2c4976b07b7883261		 pdf-font-stream PDF embedded font (sfnt) at offset 0x896C 11440 bytes

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