Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d29f1702e7c95fd…

MALICIOUS

PDF

37.9 KB Created: 2020-08-10 09:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18c0d867356cca3c6bee19ad8a551e6a SHA-1: 10b9595a73439145ee73468c37dbf88f82df7a67 SHA-256: 9d29f1702e7c95fd4be23f8353aff0ae1ee0dcc2967bfcb1d55bab529b2333d8
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the primary intent is to redirect the user to a malicious site, likely for phishing or to download further malware. The heuristic firings strongly support this, indicating the PDF is designed as a malicious redirector and part of a link farm.

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.cc/pify?keyword=ecology+and+environment+by+pd+sharma+pdf
    • http://ledez.carlosdepaula.co.uk/uploads/1/3/1/4/131437792/c41225389689c59.pdf
    • http://files.upcountryfarms.com/uploads/1/3/1/8/131858661/sokanamupavogizaredu.pdf
    • http://turodi.andywintherdogtraining.com/uploads/1/3/0/8/130814328/jewug-zojokoxuduxavo-nozetokepese.pdf
    • https://cdn.shopify.com/s/files/1/0435/7026/6273/files/90670415071.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/91039341253.pdf
    • https://cdn.shopify.com/s/files/1/0432/4786/1928/files/jerikexel.pdf
    • https://cdn.shopify.com/s/files/1/0432/8495/5300/files/baal_shem_suite.pdf
    • https://cdn.shopify.com/s/files/1/0432/0867/1394/files/75258414754.pdf
    • https://cdn.shopify.com/s/files/1/0438/5384/0534/files/56413895844.pdf
    • https://cdn.shopify.com/s/files/1/0434/2346/5623/files/biology_book_grade_10_12.pdf
    • https://cdn.shopify.com/s/files/1/0433/7978/5886/files/30396831002.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5013/files/cfo_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0433/7618/1404/files/capteur_de_temprature_d_air_d_admission.pdf
    • https://cdn.shopify.com/s/files/1/0437/9734/8514/files/70183215696.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/modizaminenidemuzafoka.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tuwupijisunuxavupo.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_off000047c5.bin
02dc4a446ab844249a2785efc9f1b2e99dbacce2405e7aabb090b9fa61b6d9dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47C5 5616 bytes
font_01_sfnt_off00005ab7.bin
09b78c8bac60424ba6cc0e30aaaf3836088f8d456fde30c054feef28eb4b0b81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB7 9812 bytes
font_02_sfnt_off00007c58.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C58 4324 bytes

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