Malicious PDF — malware analysis report

Static analysis result for SHA-256 862d002c07009dfa…

MALICIOUS

PDF

53.5 KB Created: 2020-08-04 16:37:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20207618789ba56031d36e12c9b64424 SHA-1: 4247d571410aeca1313c372efac330c2ca0785fe SHA-256: 862d002c07009dfab6e564e5b9e38cd2dd89a8703d890314b5dc82351f8dd7cd
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a URL designed for SEO spam. The document body, though heavily obfuscated, contains references to the same redirector URL and appears to be generated by wkhtmltopdf, a tool often used for creating SEO-optimized content. The primary intent is to redirect users to malicious content via a deceptive lure.

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=the+ultimate+beginners+guide+to+digital+photography+pdf
    • http://files.meditationgiftshop.com/uploads/1/3/1/8/131871871/tonabajilevipo.pdf
    • http://files.americanmelodrama.com/uploads/1/3/0/8/130813899/5895892.pdf
    • http://files.vanessasteck.com/uploads/1/3/0/8/130813546/rurisuginax-nafura-niguduxuzapiku-zemekivutuki.pdf
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/69140515894.pdf
    • https://cdn.shopify.com/s/files/1/0431/4388/9058/files/jigaseginafikiguxoli.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98973723668.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/90379225571.pdf
    • https://cdn.shopify.com/s/files/1/0430/8742/9785/files/vowoxeresegavutonuxozajir.pdf
    • https://cdn.shopify.com/s/files/1/0435/1285/6731/files/marine_corps_drill_and_ceremonies_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/moker.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/girotimovu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5912/files/begakosavawepogekazev.pdf
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/61312318585.pdf
    • https://cdn.shopify.com/s/files/1/0430/5502/2234/files/33757542366.pdf
    • https://cdn.shopify.com/s/files/1/0434/0711/4391/files/72636017670.pdf
    • https://cdn.shopify.com/s/files/1/0432/2800/4507/files/basememeg.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000091f9.bin
c81fc32df472daf20ddf0c50c28972c7d72836dfc91c06966f5906f179061ff7
pdf-font-stream PDF embedded font (sfnt) at offset 0x91F9 5648 bytes
font_01_sfnt_off0000a4fe.bin
197ff02920f587daa038e03a8b0be67318a7d9ba40171e9cd7d31b049168fc0e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA4FE 10400 bytes