Malicious PDF — malware analysis report

Static analysis result for SHA-256 b032bd829d8dafc2…

MALICIOUS

PDF

45.8 KB Created: 2020-08-05 05:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b15f10d4559dd70fc281aa1c5b72745 SHA-1: f2c15d0147789f2368861ff905588c2df447c173 SHA-256: b032bd829d8dafc2bcef0481176c9cb6c0ec848f0fed1607a809ab31b7a30e2f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL as the malicious redirector, indicating a lure to a malicious site. The presence of a link farm further suggests an attempt to manipulate search engine results or distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=antonio+gramsci+subaltern+pdf
    • http://zexake.nortonshoresparks.org/uploads/1/3/1/8/131856725/6535235.pdf
    • http://files.andersonfrey.com/uploads/1/3/0/8/130813876/walagadunu.pdf
    • http://nifivom.debbiecordeiro.com/uploads/1/3/1/4/131482962/kidavus-latusoresu-fugepodexuviv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76957488457.pdf
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/84487079960.pdf
    • https://cdn.shopify.com/s/files/1/0431/5136/0164/files/76811098784.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2454/files/pezewodekalosinezozu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8273/files/rusivarusano.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2042/files/new_idea_5209_discbine_parts_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0434/8674/0646/files/48796623392.pdf
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/97518960800.pdf
    • https://cdn.shopify.com/s/files/1/0438/8562/5499/files/citric_acid_cycle_biochemistry.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_off00007540.bin
5325e80a38d1988f77464b3077602bf90a0b392d141486fe817619c34b52b7f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7540 5604 bytes
font_01_sfnt_off00008839.bin
70a70bbd3c3626947a345753336f99497d641f019783f603d37bf62c3ee0b02a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8839 10104 bytes

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