Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e63b59604273fe5…

MALICIOUS

PDF

43.7 KB Created: 2020-08-12 21:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ff60d2f8a6de23887f09ebabd5b169c SHA-1: 34353c97763b277d27748f47b2e6733ae90d851a SHA-256: 7e63b59604273fe5ba9b9e1d44afcb319bb954f86e5c36b38a4b8eaf56fa0408
154 Risk Score

Malware Insights

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

The PDF document contains a lure related to creating a CV in PDF format, but its primary function is to host a large number of external links, many of which point to a redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that one of the embedded URLs leads to known malicious infrastructure. The 'PDF_SEO_LINK_FARM' heuristic further suggests the document is designed to generate traffic through numerous outbound links. No scripts were extracted from this sample.

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/pify?keyword=cara+membuat+cv+dalam+format+pdf
    • http://files.kiefferphotography.com/uploads/1/3/2/7/132740378/fadet.pdf
    • http://files.ionasoccerclub.com/uploads/1/3/2/6/132696030/nodaz-kidekuxulava-sifavo-piragexopefuj.pdf
    • http://files.eventsmc2.com/uploads/1/3/1/4/131406182/6e0d45.pdf
    • http://files.bournemouthjrc.co.uk/uploads/1/3/0/7/130776445/luxadezamu_kesudidolux.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/pumik.pdf
    • https://cdn.shopify.com/s/files/1/0432/1699/4466/files/lonilolobuvog.pdf
    • https://cdn.shopify.com/s/files/1/0435/2478/4283/files/remove_ads_from_android.pdf
    • https://cdn.shopify.com/s/files/1/0429/3551/7337/files/39493045636.pdf
    • https://cdn.shopify.com/s/files/1/0435/4772/1892/files/99350974659.pdf
    • https://cdn.shopify.com/s/files/1/0433/4757/4949/files/baja_autoestima_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0435/4605/0728/files/50125819667.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/pigun.pdf
    • https://cdn.shopify.com/s/files/1/0430/8674/1655/files/gasujurujokibozelufenox.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8515/files/fevuletolebinu.pdf
    • https://cdn.shopify.com/s/files/1/0446/0986/3843/files/buku_akuntansi_biaya_mulyadi.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e36.bin
05e5c70a1f021f72e1ae9dd5e281d4d0874ac9f48815702ab3c9990b0b90a3b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E36 5228 bytes
font_01_sfnt_off00007fec.bin
98d4bcba04dcba025e834f358854bc3bc012c3ccf479b750a1bb5d06ece5657d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FEC 9900 bytes

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