Malicious PDF — malware analysis report

Static analysis result for SHA-256 1221ab716e6d884e…

MALICIOUS

PDF

39.1 KB Created: 2020-08-19 23:04:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05d3bc7873b93aca1ee6ce890c3124ed SHA-1: a4a594fd436a2c792ece2cac5a30038af15f4091 SHA-256: 1221ab716e6d884e6a4fa557ad7deff7aa40cf81878a36d969ec3886b3b20b65
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a 'bean seed germination lab report' and includes the malicious URL. The presence of many external links suggests a link farm or SEO poisoning tactic, likely intended to drive traffic to malicious sites.

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=bean+seed+germination+lab+report
    • http://files.northcoastoutfitters.com/uploads/1/3/0/8/130874058/8006452.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/1006/4537/files/get_anyone_to_do_anything.pdf
    • https://cdn.shopify.com/s/files/1/0454/2342/7752/files/railway_application_form_check.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/modewamifiju.pdf
    • https://cdn.shopify.com/s/files/1/0438/3296/7318/files/59001585922.pdf
    • https://cdn.shopify.com/s/files/1/0431/1118/6585/files/wuvujifufukimeforo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4516/5976/files/tamil_rowdy_baby_video_songs.pdf
    • https://cdn.shopify.com/s/files/1/0433/4003/8302/files/gabalubutaninus.pdf
    • https://cdn.shopify.com/s/files/1/0434/2611/9831/files/zerabigotuxanuzufuvumaxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/96699267166.pdf
    • https://cdn.shopify.com/s/files/1/0447/6056/3861/files/converting_to_editable_word_document_free_online.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_off00005c18.bin
eb10c1bc93509c6e4ace24ccb23602cb8a9861e8617cd1b652a6a8d5af1c80fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C18 5468 bytes
font_01_sfnt_off00006e8c.bin
94cfa7f3ec119d584a131d5d9406e01724338fdd926f1ecb2264cc5447889d4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8C 9728 bytes