Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b11228de97323f…

MALICIOUS

PDF

48.8 KB Created: 2020-08-07 02:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1e12776bf69c2a74d25ced3a3dcb037 SHA-1: ffa5a0d495be37b02074716e3ac6a93be173086e SHA-256: 60b11228de97323fc8fe5e8fe5f47419b303bf052308a0c8cb9ca67a7ec10673
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to PDF files hosted on Shopify. One of these links, however, directs to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The presence of embedded URLs and the link farm suggest an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

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=american+gods+pdf+francais
    • http://zuxagop.asiamitchelltabb.com/uploads/1/3/1/8/131872055/6872993.pdf
    • http://juzidufe.momox.org/uploads/1/3/1/3/131383314/1190880.pdf
    • http://files.isrwintersprings.com/uploads/1/3/0/8/130873738/jepivijenuru.pdf
    • http://files.papanoelstore.com/uploads/1/3/1/4/131438510/bazisomuju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9798/1089/files/46913937637.pdf
    • https://cdn.shopify.com/s/files/1/0441/3505/5512/files/dumakixosav.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/nuwaxiwetaga.pdf
    • https://cdn.shopify.com/s/files/1/0436/1447/0302/files/bioethics_ebooks.pdf
    • https://cdn.shopify.com/s/files/1/0433/8168/6439/files/2545569042.pdf
    • https://cdn.shopify.com/s/files/1/0440/8170/9206/files/kajojowogadazawevuxas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0441/9478/files/cardiovascular_disease.pdf
    • https://cdn.shopify.com/s/files/1/0430/8962/5241/files/tepeze.pdf
    • https://cdn.shopify.com/s/files/1/0434/9617/7816/files/dnd_5e_warlock_multiclass.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4846/files/singer_99k_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/a_b_c_chart.pdf
    • https://cdn.shopify.com/s/files/1/0450/1661/3014/files/edgar_cayce_nyc.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_off0000812a.bin
e9fd30f4f1ad974080329083e17ee4b72fc5901152e61d864211bad3dc9b4f5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x812A 5432 bytes
font_01_sfnt_off0000938d.bin
bc4d4f2cddcf1b941a037f96ad23896020939292cc6d897998058f466bedaf69
pdf-font-stream PDF embedded font (sfnt) at offset 0x938D 10416 bytes