Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f1741928299742…

MALICIOUS

PDF

44.8 KB Created: 2020-08-26 09:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0692f0586d879eee36a9229137b9c8f7 SHA-1: 442108b6f501a18e47eb3f7cc4dcf8cb8ccae06d SHA-256: 67f174192829974255d05c9a18ffcbb73e1225aaee70e803a17b7103f28b4416
154 Risk Score

Malware Insights

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

The PDF document contains embedded URLs, with one identified as a malicious redirector. The document body text, though partially corrupted, mentions 'Icloudin download server', suggesting a phishing lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to obscure the malicious redirector.

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.cc/pify?keyword=icloudin+download+server
    • http://files.janetslove.com/uploads/1/3/0/7/130775917/873e3c0de677d6.pdf
    • http://dedape.bronxbash.com/uploads/1/3/2/7/132710567/xeguxofatezaloworat.pdf
    • http://files.concernedcitizensohio.org/uploads/1/3/0/7/130739117/vekaraz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/totavari.pdf
    • https://cdn.shopify.com/s/files/1/0433/9128/7452/files/filenona.pdf
    • https://cdn.shopify.com/s/files/1/0435/3448/3605/files/accounting_spreadsheet_google_docs.pdf
    • https://cdn.shopify.com/s/files/1/0429/6487/7471/files/labininudurozoxogunefu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8871/files/lugakawafaji.pdf
    • https://cdn.shopify.com/s/files/1/0430/6337/8081/files/67634259104.pdf
    • https://cdn.shopify.com/s/files/1/0428/3092/1895/files/61254292826.pdf
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/tasawemebip.pdf
    • https://cdn.shopify.com/s/files/1/0448/1227/1782/files/plumbing_and_sanitary_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0433/3430/3912/files/79327344723.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_off00006adf.bin
940ba1b5f963fc690d07412f1db2cbf5a71395cdb4d2d5b0307bcfb2cd081ceb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADF 5024 bytes
font_01_sfnt_off00007c08.bin
0196bda681a20002aee5b76fada6d127653cb3a32c6c3e832c59783ae78c83a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C08 13620 bytes