Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0916d367f5e48ae…

MALICIOUS

PDF

38.9 KB Created: 2020-08-28 13:38:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa5d2e7bea2cb8d5b9aac35cbad8a512 SHA-1: d5f18c233be82466056fdc36f2e44e6f87601b3b SHA-256: b0916d367f5e48ae2174593e1860d3342aa3e94a83501e1f00e5747ea5658411
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users into clicking on further malicious links. The document body, though partially corrupted, contains text related to 'Apache server etag header information disclosure' and includes the malicious URL, suggesting a phishing or scam attempt. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning and traffic redirection.

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=apache+server+etag+header+information+disclosure
    • http://files.cmw-bas.co.uk/uploads/1/3/1/1/131163740/3791598.pdf
    • http://files.cliffjacobsonmft.com/uploads/1/3/0/9/130969960/8509927.pdf
    • http://fivugugu.angelaherbert-hodges.com/uploads/1/3/2/7/132740763/1775cf58f.pdf
    • http://jezul.ballywalterpci.org/uploads/1/3/1/0/131070702/6c87b0.pdf
    • http://wutakiro.abbydecoratingden.com/uploads/1/3/0/7/130738946/3f0e2baae88b72.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/agricultural_systems_modeling_and_simulation.pdf
    • https://cdn.shopify.com/s/files/1/0433/1556/0616/files/talelapiwoxix.pdf
    • https://cdn.shopify.com/s/files/1/0432/6080/5280/files/kewejenotalopufiwus.pdf
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/sukikazutuvaxagexunasiki.pdf
    • https://cdn.shopify.com/s/files/1/0434/0734/3772/files/niwobugeduk.pdf
    • https://cdn.shopify.com/s/files/1/0432/6863/6834/files/dawn_of_sorrow_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0438/7376/3496/files/oxford_discover_grammar_1.pdf
    • https://cdn.shopify.com/s/files/1/0440/6371/9574/files/engineering_mechanical_drawing.pdf
    • https://cdn.shopify.com/s/files/1/0462/5052/4823/files/ruvizemoxux.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/44666510333.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_off00005659.bin
bab66a678e0f063018b70f9a2247439a378d3f8b8d090bb2ff0214f11774a66a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5659 5620 bytes
font_01_sfnt_off0000694c.bin
d9c6afac5ff70975006d3fae800597a5e513b75b59db324cedf38eb7a373f93d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x694C 10384 bytes

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