Malicious PDF — malware analysis report

Static analysis result for SHA-256 63bd92226c5e36d5…

MALICIOUS

PDF

45.9 KB Created: 2020-08-26 02:24:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f75458816a39a4769ca6af1c4db3c69 SHA-1: 2cfabc703552abec4ad44c44349928ce99a87b20 SHA-256: 63bd92226c5e36d520a02626e15b958843b8f931c536cc08c4e856a1343a4ea7
162 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download prompt for 'Groove IP'. It also hosts a large number of external PDF links, likely for SEO manipulation or to host further malicious content. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL confirms the intent to lead the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=groove+ip+download
    • http://ridifir.loveadelyn.com/uploads/1/3/0/9/130969525/5402300.pdf
    • http://tagen.rgcgymnastics.org/uploads/1/3/0/8/130813509/getafoda.pdf
    • http://wodobinab.birdandblossom.com.au/uploads/1/3/1/8/131857120/bowajodo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/0866/2440/files/pradhan_mantri_awas_yojana_form_gujarat.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/66717643585.pdf
    • https://cdn.shopify.com/s/files/1/0437/7821/1991/files/lifaperutidopele.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3820/files/vavuxojegewazusaraz.pdf
    • https://cdn.shopify.com/s/files/1/0435/1698/5498/files/super_smash_bros._rom_n64.pdf
    • https://cdn.shopify.com/s/files/1/0434/4276/5991/files/87376112899.pdf
    • https://cdn.shopify.com/s/files/1/0432/2246/6727/files/mebesixa.pdf
    • https://cdn.shopify.com/s/files/1/0435/2347/3568/files/evenesence_lithium_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/vabaramadejinidinozaja.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/68736518606.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/wamubidomolumap.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d4b.bin
375b0d580fb126d05759874f812b985d821e3c30e80b0cd79568695d8a8257ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4B 4956 bytes
font_01_sfnt_off00006e55.bin
4370b3232d49d6a1b47ff09340446f0f8710f49ad1dafd1f855dcfb2964e46c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E55 11784 bytes
font_02_sfnt_off00009549.bin
c2f1b8e27e4c5d1eb6694bcf999bed56489d599ed66a9b176e3ad865fa2ee921		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9549 16232 bytes

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