Malicious PDF — malware analysis report

Static analysis result for SHA-256 957c170b28b28d96…

MALICIOUS

PDF

41.7 KB Created: 2020-08-01 14:31:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed746675d24628a36175463367541fea SHA-1: 7fdb0cb4df700bbbd776710006109fcc4156b58a SHA-256: 957c170b28b28d961dc434e5401aec6411b036aba45e3fcaa60fe710bf232545
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for a malicious redirector. The document body explicitly contains the URL 'https://ttraff.com/pify?keyword=citrix+receiver+ubuntu', which is likely intended to trick users into downloading malicious software or visiting a phishing page. The presence of numerous shopify.com links suggests a link farm technique to improve search engine ranking for 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=citrix+receiver+ubuntu
    • http://files.rareearthsmiths.com/uploads/1/3/1/8/131871494/5153787.pdf
    • http://files.thegeekyside.com/uploads/1/3/1/4/131452872/24daa.pdf
    • http://files.zuhoorinternational.com/uploads/1/3/1/3/131398139/sawoped_sulepag_pemilo.pdf
    • http://files.tgbtgsports.com/uploads/1/3/0/7/130739570/fuxule-disoju-kifapafikewiz-pasitefox.pdf
    • https://cdn.shopify.com/s/files/1/0428/2567/9015/files/romijikesakolumavu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/fusavoxopaxuzotejibidu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5822/files/fabomariritowugenaxobuped.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/tasowerimetew.pdf
    • https://cdn.shopify.com/s/files/1/0431/7783/6702/files/sunuwaveme.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3457/files/renovogerifafimabelexuxaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0615/6190/files/basamojowolixewi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3030/6203/files/7986954982.pdf
    • https://cdn.shopify.com/s/files/1/0427/6974/4028/files/pixoleruse.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8273/files/gofodutavusuziletivip.pdf
    • https://cdn.shopify.com/s/files/1/0429/2640/7833/files/62756556731.pdf
    • https://cdn.shopify.com/s/files/1/0433/6100/9829/files/33606328128.pdf
    • https://cdn.shopify.com/s/files/1/0430/6839/1591/files/19322409303.pdf
    • https://cdn.shopify.com/s/files/1/0434/9342/5316/files/vojono.pdf
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/lukokadabuwe.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_off0000678d.bin
ef619fe2d70b01b79e7f93165711977fda9bb17ce160468affbdc4749c54f8a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x678D 4548 bytes
font_01_sfnt_off0000771c.bin
c4ab0878da1fd1a6730bacaff7ec47a4faecf6a66fb49c3a65446283730eda72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x771C 10180 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.