Malicious PDF — malware analysis report

Static analysis result for SHA-256 bccfa9396989a132…

MALICIOUS

PDF

33.5 KB Created: 2020-08-08 16:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd4a34daf894d6274606fadf3cb281d5 SHA-1: 90fe66a5f7dcc5c4c0559d14d5725defc5ee0de3 SHA-256: bccfa9396989a1328ded2765cfbf8cc52f56b0e26c3de41932dc804e5bbddb74
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector at `ttraff.cc`. This suggests the document's primary purpose is to lure users into clicking malicious links. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=balada+para+adelina+piano+pdf
    • http://files.ballindenisk.org/uploads/1/3/2/3/132303245/supukukivawo.pdf
    • http://noliba.mjmonty.us/uploads/1/3/1/6/131606490/pimedaxam.pdf
    • http://files.ogdenroofers.com/uploads/1/3/0/9/130969699/logadoju.pdf
    • http://files.warnreserve.com/uploads/1/3/0/9/130969999/warub_dabitugexiromij_jadekuvoloju.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rerivavegexem.pdf
    • https://cdn.shopify.com/s/files/1/0435/9313/8333/files/29460318000.pdf
    • https://cdn.shopify.com/s/files/1/0435/1731/3178/files/59570796336.pdf
    • https://cdn.shopify.com/s/files/1/0433/9177/8965/files/tinukilug.pdf
    • https://cdn.shopify.com/s/files/1/0433/4731/2789/files/vutozumesigune.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38692385895.pdf
    • https://cdn.shopify.com/s/files/1/0432/8144/9118/files/29766986426.pdf
    • https://cdn.shopify.com/s/files/1/0437/3594/1274/files/20703120579.pdf
    • https://cdn.shopify.com/s/files/1/0432/1666/6786/files/wipevuwisiziteji.pdf
    • https://cdn.shopify.com/s/files/1/0432/7217/5781/files/57705927751.pdf
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/wunebofu.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_off00004736.bin
f6af3b90b28fd1a77d9895377388fd913308c9f30ad95eff8dc2fb8be776500e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4736 4908 bytes
font_01_sfnt_off000057f6.bin
5251a83757610f337a2c609a8265eb3e0db59216e1a6f71400cff8032cd46abe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57F6 9756 bytes

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