Malicious PDF — malware analysis report

Static analysis result for SHA-256 596c493a1227d207…

MALICIOUS

PDF

42.1 KB Created: 2020-08-07 18:21:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 237dd7ffbeb4aa530466bc67de6ea86f SHA-1: 06173832bce38a2b4dabfdf39df10878ce68f035 SHA-256: 596c493a1227d20778468d9966992433a509d34ed20e6e216f0a9b4151978ee8
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text related to 'Cbse class 12 economics syllabus pdf' and includes the malicious URL, suggesting a phishing or social engineering lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely for SEO manipulation or to host further malicious content.

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=cbse+class+12+economics+syllabus+pdf
    • http://damat.mitradingschool.com/uploads/1/3/0/9/130969465/tavugifedala_giderif_jodaxe_jozebeditemomo.pdf
    • http://files.gracebaptistlynden.com/uploads/1/3/2/6/132681296/zuripijewoliwoj.pdf
    • http://files.yawenyang.com/uploads/1/3/0/9/130969597/vuzejipanabamipowu.pdf
    • http://files.danflongband.com/uploads/1/3/1/6/131606366/totesijexinumuwame.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/natajibeziritexib.pdf
    • https://cdn.shopify.com/s/files/1/0435/0207/6070/files/ingobernable_netflix._webrip_trollhd.pdf
    • https://cdn.shopify.com/s/files/1/0430/8910/0951/files/23051563729.pdf
    • https://cdn.shopify.com/s/files/1/0432/9321/2827/files/jebuledokadolitada.pdf
    • https://cdn.shopify.com/s/files/1/0432/0172/4577/files/rufakepuked.pdf
    • https://cdn.shopify.com/s/files/1/0431/8140/8420/files/kulodedar.pdf
    • https://cdn.shopify.com/s/files/1/0429/0206/1215/files/basic_electronics_short_notes.pdf
    • https://cdn.shopify.com/s/files/1/0430/6780/1749/files/99438933571.pdf
    • https://cdn.shopify.com/s/files/1/0434/4945/0661/files/14012012134.pdf
    • https://cdn.shopify.com/s/files/1/0433/6910/3528/files/83720696553.pdf
    • https://cdn.shopify.com/s/files/1/0434/4964/7261/files/kagaxikaxipexoxumafavom.pdf
    • https://cdn.shopify.com/s/files/1/0433/7909/7758/files/59295153554.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/junukabubatinumer.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_off0000654e.bin
9ddc6ec3e3d7baa51e0e509b376b5c9d7c340fb7428370b24929c492486fb0bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x654E 5536 bytes
font_01_sfnt_off0000781f.bin
b21126dc0405d8a397fedc925d9c4ab529133329e64ac1ec15ff3fae69162705		 pdf-font-stream PDF embedded font (sfnt) at offset 0x781F 10376 bytes

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