Malicious PDF — malware analysis report

Static analysis result for SHA-256 22cd5f233444912f…

MALICIOUS

PDF

44.1 KB Created: 2020-07-20 02:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a6b5f88105a59740e59262147700634 SHA-1: f21120c6973e0118ca3e8eab68c24c641af5c224 SHA-256: 22cd5f233444912f5f82e664bd8bba69830fa058e1799c5704adb9717db67aa6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link and a PDF link farm, indicating a high likelihood of malicious intent. The embedded links likely serve to distribute further malicious content or engage in SEO spam. No scripts were extracted from this sample, but the extensive link farm strongly suggests a malicious delivery mechanism.

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/wb?keyword=phase%203%20vowel%20digraphs%20worksheets
    • http://files.trailcreekcoffeeroasters.com/uploads/1/3/1/4/131437515/gagibe_zibeporizosoki_zaxufew.pdf
    • http://files.northcountryblog.com/uploads/1/3/2/7/132712005/dezupabizumab.pdf
    • http://files.xtratouchexpo.com/uploads/1/3/0/7/130740221/fe20cfa9eeb54.pdf
    • http://files.chemistrygods.net/uploads/1/3/1/4/131454766/40d1cd21.pdf
    • http://files.sagegardeners.org/uploads/1/3/1/4/131408970/72ac8c088.pdf
    • http://files.rollingthunderflorida1.org/uploads/1/3/1/3/131398335/wubofod-diwixiz-kipogarat-jumidalewi.pdf
    • http://files.redzonebar.ca/uploads/1/3/0/8/130874599/jaxefisesukoxa_buvodurezo_losaw_zajurujefizaza.pdf
    • http://files.shinnbros.com/uploads/1/3/1/4/131453998/pujizokiv-rojixefonam-dinukasuzatab.pdf
    • http://files.bayareasomaticpsychotherapy.com/uploads/1/3/0/9/130969478/354538de2dc.pdf
    • http://files.chemistrygods.net/uploads/1/3/1/4/131454766/40d1c
    • https://dowasibiwupu.files.wordpress.com/2020/07/fatip.pdf
    • https://depemit.files.wordpress.com/2020/07/kalepigiwituf.pdf
    • https://wekunupapire.files.wordpress.com/2020/06/bipumo.pdf
    • https://xiwujope.files.wordpress.com/2020/07/14104847663.pdf
    • https://supabiwijud.files.wordpress.com/2020/07/87970932874.pdf
    • https://cdn.shopify.com/s/files/1/0431/3841/6801/files/zowupafimodedunaxof.pdf
    • https://cdn.shopify.com/s/files/1/0431/6325/4944/files/46612214090.pdf
    • https://cdn.shopify.com/s/files/1/0432/5149/9170/files/84728773086.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/figarawevig.pdf
    • https://cdn.shopify.com/s/files/1/0434/0989/9670/files/tetaxid.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/14342813305.pdf
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/13931720523.pdf
    • https://cdn.shopify.com/s/files/1/0433/8289/8840/files/50583119886.pdf
    • https://cdn.shopify.com/s/files/1/0433/9741/5077/files/51969199552.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_off00006ea2.bin
1f530e2dfaa020f08b65c407d6e066bef89bb68c69349abed83d76cc42f297bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA2 5284 bytes
font_01_sfnt_off000080c0.bin
11f21ffb8904b11a83367d39695945d705b693ccd6d90167ef02c8d0826e7112		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80C0 9848 bytes

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