Malicious PDF — malware analysis report

Static analysis result for SHA-256 c31340b1449b8b97…

MALICIOUS

PDF

40.8 KB Created: 2020-08-15 06:40:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a00ccb527e31e36f62f5f430e4723c7e SHA-1: 03e6b1e7dd9a657d71f6caf44268803eb23141f5 SHA-256: c31340b1449b8b9707051379a776bf9bb77b6c4480e7877bc1ef0eaafecdb845
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=jigsaw+powerpoint+template+free'. This indicates the document's primary purpose is to redirect users to potentially harmful content. The presence of a large number of external PDF links, many hosted on Shopify, further supports the idea of a link farm designed to attract clicks. The ML classifier also strongly flagged this PDF as malicious.

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=jigsaw+powerpoint+template+free
    • http://lomegepid.sustainableswansea.net/uploads/1/3/0/8/130814328/sijarena-pisabu.pdf
    • http://tivok.littlegiantproductions.ca/uploads/1/3/2/3/132302857/dezopubunirogagu.pdf
    • http://files.dronkadiscountstore.com/uploads/1/3/0/7/130775506/b353d556eb.pdf
    • https://cdn.shopify.com/s/files/1/0431/0849/9618/files/download_bhagavad_gita_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0432/7312/6052/files/92429913432.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fovurasavelibegesixaga.pdf
    • https://cdn.shopify.com/s/files/1/0431/6482/7805/files/pejukamubapid.pdf
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/keruvovuru.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/48116093136.pdf
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/72702008883.pdf
    • https://cdn.shopify.com/s/files/1/0430/4103/0293/files/24532466753.pdf
    • https://cdn.shopify.com/s/files/1/0431/9268/0611/files/98913921621.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87664315042.pdf
    • https://cdn.shopify.com/s/files/1/0437/2620/9175/files/social_psychology_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0438/9090/1144/files/marvel_encyclopedia_new_edition_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/7143/1065/files/subararoxega.pdf
    • https://cdn.shopify.com/s/files/1/0437/6464/6037/files/12962495650.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_off0000629f.bin
a72c7ec1a69640833a98358aa6cf5ed4b8477380cd469bf7dd03103276b52339
pdf-font-stream PDF embedded font (sfnt) at offset 0x629F 5300 bytes
font_01_sfnt_off000074a1.bin
350bdbf0ba88f97ffd2e735c14aeb725aef0267c28162a3dfbc0b399d8f55cff
pdf-font-stream PDF embedded font (sfnt) at offset 0x74A1 9804 bytes