Malicious PDF — malware analysis report

Static analysis result for SHA-256 53a6c8f84de8715a…

MALICIOUS

PDF

49.6 KB Created: 2020-09-02 03:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b4bb2ef50bacae485bc24aefa7b162f SHA-1: baa74c51befb60390483bc631be55ea63bf5224e SHA-256: 53a6c8f84de8715a021dd802418eabe0ab69daebb0e55dfef8cc48f151868229
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that, when clicked, redirects to a known malicious domain. The document body text, though heavily obfuscated, includes keywords related to 'Aadhaar card update' and the malicious URL, suggesting a social engineering lure. The heuristic firings confirm the presence of malicious redirector links and a link farm within the PDF, strongly indicating 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.ru/wix?keyword=aadhaar+card+update+mobile+number+pdf+form
    • https://static.usrfiles.com/ugd/921909_fa84730bdd7745c3941809813684daca.pdf
    • https://static.usrfiles.com/ugd/90423f_f34c29bfa28d4a5a8256b82ae9d51720.pdf
    • https://static.usrfiles.com/ugd/b8c837_27a0d77b368d467cbf1d346bdddbaac8.pdf
    • https://static.usrfiles.com/ugd/253000_7c7eb46d029349489edefe4ceefd8b2d.pdf
    • https://cdn.shopify.com/s/files/1/0441/1041/3976/files/application_of_plant_genetic_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0440/1060/2661/files/can_can_piano_easy.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/pirutanabetimureti.pdf
    • https://cdn.shopify.com/s/files/1/0434/1868/1496/files/38237491731.pdf
    • https://static.usrfiles.com/ugd/daca0d_a92c023863584cf0851537f3313a1112.pdf
    • https://static.usrfiles.com/ugd/72216b_13cad7d72fb345599793594c3b8e7037.pdf
    • https://static.usrfiles.com/ugd/b8c837_81b48788db024d088584af02255238f5.pdf
    • https://static.usrfiles.com/ugd/89363e_06b2794bdbb1462bb56299520a46c416.pdf
    • https://cdn.shopify.com/s/files/1/0463/4571/5873/files/88115820083.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/40518222293.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061bf.bin
b5a9ffe045c46aabeaedf154fd95ac94dcbf87dad7a416aaf716322d8564b668		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61BF 5228 bytes
font_01_sfnt_off00007354.bin
eb1299e33ccc12f70e3e8fc7dd127819a307c30f9514a9e04301be03789b6624		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7354 10044 bytes
font_02_sfnt_off000095e3.bin
ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95E3 16164 bytes
font_03_sfnt_off0000aafb.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAFB 4324 bytes

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