Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1aa3d9792101a8a…

MALICIOUS

PDF

43.1 KB Created: 2020-08-03 16:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c280fd8e39e77be5242f8a89d9ee912f SHA-1: 3503965dbe61a2fa788dfc3791f9669a905ef3e9 SHA-256: d1aa3d9792101a8a2873589ed021c22232005bdd09861bf51f89d95c4b7f04f6
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.cc, which is disguised as a document about industrial steam generators. The document also contains a large number of external links, many of which point to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic. The ML classifier also flagged this PDF with high confidence.

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.cc/pify?keyword=generadores+de+vapor+industriales+pdf
    • http://files.danielsuniqueartforms.com/uploads/1/3/0/8/130813796/8770157.pdf
    • http://files.lifeofastreetdog.com/uploads/1/3/1/8/131856318/poremitaw-werapudike-mapodap.pdf
    • http://files.allinonepetcare.com/uploads/1/3/1/4/131452826/vekovof.pdf
    • http://files.barnsandburleycandleco.com/uploads/1/3/0/8/130813528/ruzaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/4936/9252/files/91280940555.pdf
    • https://cdn.shopify.com/s/files/1/0428/7997/5591/files/vajisekunotanawu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3971/1655/files/45743856591.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tikodizexosuva.pdf
    • https://cdn.shopify.com/s/files/1/0435/8746/9471/files/12681181068.pdf
    • https://cdn.shopify.com/s/files/1/0430/1350/5185/files/65243455259.pdf
    • https://cdn.shopify.com/s/files/1/0435/1524/8794/files/70986292551.pdf
    • https://cdn.shopify.com/s/files/1/0431/7285/5967/files/acs_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/gilowewofuno.pdf
    • https://cdn.shopify.com/s/files/1/0433/0592/6809/files/fimal.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_off000068d8.bin
74dea547457937307f6afde6cc5f4d718ecb01adcc44bcdfc2631f7b7d3b0b31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68D8 5128 bytes
font_01_sfnt_off00007a65.bin
17ffe2d94e3b7d93f67870839963db314e369856105b3a14022c2e77586be7a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A65 10680 bytes

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