Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d30eb1ed46562af…

MALICIOUS

PDF

66.7 KB Created: 2020-08-25 05:21:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8593bda326dba16990f2971f70349e2 SHA-1: 0043c4f0cd2c51b16d99ac5be26bc526aa592d25 SHA-256: 2d30eb1ed46562af10259ba6222832645e804d6ee546532a72836067b4b86a24
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body text, though partially corrupted, includes the phrase 'Tenancy agreement form online' and the malicious URL, suggesting a phishing lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to obscure the final malicious destination. The ML classifier strongly flagged this PDF as malicious.

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=tenancy+agreement+form+online
    • http://files.millercounselingserv.com/uploads/1/3/1/0/131070604/ca9f1af929ac2.pdf
    • http://files.klineconsultingagency.com/uploads/1/3/2/3/132302951/d4f65487.pdf
    • http://files.bulutmak.net/uploads/1/3/1/4/131438758/7cb650f44.pdf
    • http://fejeboti.youglowgirlva.com/uploads/1/3/2/8/132814930/duxoz_nasufudap_tufaginebuw.pdf
    • http://files.bluemantaswimming.com/uploads/1/3/1/3/131380342/5fdd29.pdf
    • https://cdn.shopify.com/s/files/1/0432/9367/1588/files/zonokaxukano.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1866/files/gajuxetemutijoguwa.pdf
    • https://cdn.shopify.com/s/files/1/0435/0866/2440/files/xuwefex.pdf
    • https://cdn.shopify.com/s/files/1/0438/1753/3597/files/48563034227.pdf
    • https://cdn.shopify.com/s/files/1/0435/0260/0356/files/mhw_charge_blade_guide_xbox.pdf
    • https://cdn.shopify.com/s/files/1/0431/3438/6332/files/kopumufalobajuka.pdf
    • https://cdn.shopify.com/s/files/1/0434/5816/6949/files/ensayo_de_escepticismo.pdf
    • https://cdn.shopify.com/s/files/1/0435/0961/2712/files/tupac_bury_me_ag.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3821/files/pulapamometek.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba51.bin
b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA51 2828 bytes
font_01_sfnt_off0000c44c.bin
08b3c7865b0b4bfd5af0e8a5bc8de5b238f181ef4cfa3981ef6d5c99a809f223
pdf-font-stream PDF embedded font (sfnt) at offset 0xC44C 5076 bytes
font_02_sfnt_off0000d585.bin
3035d5f541b394db4b99821f555584bbe13f30e7344c70356145d11ed753ee09
pdf-font-stream PDF embedded font (sfnt) at offset 0xD585 12424 bytes