Malicious PDF — malware analysis report

Static analysis result for SHA-256 64abeccddfe34c4a…

MALICIOUS

PDF

46.7 KB Created: 2020-08-08 00:19:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e1570618d8a3fddc5e84e93b485e364 SHA-1: 5b11403b9fbfab025c0b9f48a08fece6d6af7195 SHA-256: 64abeccddfe34c4aa240e036c519995a0c3940a91750688379504462b88cf76c
162 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'Jolly phonics workbook 4 pdf' and embeds numerous links, one of which, https://ttraff.ru/pify?keyword=jolly+phonics+workbook+4+pdf, is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document's structure and embedded links suggest it is designed to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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.ru/pify?keyword=jolly+phonics+workbook+4+pdf
    • http://files.sunnydaysevents.com/uploads/1/3/1/0/131071277/1850280.pdf
    • http://files.chillstonehouse.co.uk/uploads/1/3/1/8/131856743/fuvatebon-rigopikovu-zigasomuropobil.pdf
    • http://files.realtalktherapy.co.uk/uploads/1/3/1/4/131438071/wojodaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3056/1436/files/laxororewelegiwapaxeke.pdf
    • https://cdn.shopify.com/s/files/1/0428/6549/2127/files/street_address_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/7957/3414/files/89599584829.pdf
    • https://cdn.shopify.com/s/files/1/0432/7509/2132/files/fajipafunupebomeked.pdf
    • https://cdn.shopify.com/s/files/1/0435/2137/6410/files/30338925724.pdf
    • https://cdn.shopify.com/s/files/1/0429/5704/5913/files/31016009154.pdf
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/zidamefutakebodigepoxiwek.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/volume_of_octagonal_prism.pdf
    • https://cdn.shopify.com/s/files/1/0437/6444/9437/files/jojezedidakadunosobodi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4143/1464/files/48438964586.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27622062760.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/65175055070.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mokotutirajozejimus.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/kikofipumurowu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3707/3314/files/how_to_speak_english_fluently_download.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_off00007385.bin
fb935338837edddfd4816f48125e715414883aef06d2f248f3a650abeedc3371		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7385 5508 bytes
font_01_sfnt_off00008656.bin
02b5e9dc02d0d5da6a131dfdfc1ad1619079c3ce233db379aaba9f460a0d9322		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8656 11604 bytes

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