Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f34ec01d911b7a8…

MALICIOUS

PDF

50.5 KB Created: 2020-07-08 22:00:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75537652b03b17f75af5e3a7b9c5abf8 SHA-1: 5c069d90a226bd7bb088f742ae4abca9b98510fa SHA-256: 5f34ec01d911b7a8904fbf0903c2040fb24e1edce9361d3164fdd8fcb9df1388
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to redirector infrastructure or host other PDF files. The primary link leads to a known malicious redirector, suggesting a phishing or SEO spam campaign. The document body, though partially corrupted, contains keywords related to PDF downloads, reinforcing the lure.

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/wb?keyword=dress%20design%20draping%20and%20flat%20pattern%20making%20pdf%20download
    • http://files.ccmooresville.com/uploads/1/3/1/3/131381819/tanupip.pdf
    • http://files.bingocompany.net/uploads/1/3/1/3/131379612/d2857f2095895b.pdf
    • http://files.bookhivebeerclub.com/uploads/1/3/0/9/130969910/f65beae6b726.pdf
    • http://files.mycoachisabelle.com/uploads/1/3/2/3/132302892/a4afeb50.pdf
    • http://files.directnamibia.com/uploads/1/3/1/3/131379325/38fd64864bf.pdf
    • http://files.emiliomoralesmusic.com/uploads/1/3/1/3/131398134/d26bd4486a9140.pdf
    • http://files.texashollandlops.com/uploads/1/3/1/3/131379371/7953459.pdf
    • http://files.adriannegunn.com/uploads/1/3/1/8/131871979/a6cff75.pdf
    • http://files.iwstreecare.com/uploads/1/3/2/7/132740479/wogupu-zukokitoruwogog-zikezugufada-pubuzesilas.pdf
    • http://files.newyorkstategrandcouncil.com/uploads/1/3/1/4/131437538/bapemo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://tofugubu.files.wordpress.com/2020/06/28559172615.pdf
    • https://terokowexo.files.wordpress.com/2020/07/lojafiterajasazaxe.pdf
    • https://rekogexal.files.wordpress.com/2020/07/goluv.pdf
    • https://xevekebi.files.wordpress.com/2020/06/wuwosizadexezosumadamo.pdf
    • https://nimodinuti111298458.files.wordpress.com/2020/06/kesapefuduvadevugidad.pdf
    • https://powidokafivu.files.wordpress.com/2020/07/foxigawigujazito.pdf
    • https://mezatunizafu.files.wordpress.com/2020/07/88125512672.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jepomosojavadoji.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/libidurekatomanazavevufi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46676539889.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_off000087a5.bin
a2a7534594db1f0627fa93fda6d1542412137711453cf63ae9bcd65b22df1c74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87A5 5304 bytes
font_01_sfnt_off000099ac.bin
4abf1c583646032a68d534075be833f9021896c1e65bff8b42c68ff574d29091		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99AC 10160 bytes

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