Malicious PDF — malware analysis report

Static analysis result for SHA-256 aceddb831b37298d…

MALICIOUS

PDF

41.8 KB Created: 2020-08-11 07:30:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d0f2bc748ddbb89b037c26423748dbe SHA-1: 8d1dde517e699ec93e8f13ee2cfaf6bf089dc9ad SHA-256: aceddb831b37298d432be7663d9d474f9213315025a1211bdb6e0ad8d1f6a5d5
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, creating a link farm. One critical heuristic firing indicates a direct link to a known malicious redirector at 'https://ttraff.com/pify?keyword=cardinality+of+sets+pdf'. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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=cardinality+of+sets+pdf
    • http://files.melissaaltamirano.com/uploads/1/3/1/1/131164424/7588125.pdf
    • http://files.merchcow.com/uploads/1/3/0/7/130775747/vuzax.pdf
    • http://files.sfsailing.org/uploads/1/3/2/6/132695636/453de08241ec7c.pdf
    • http://files.daniellovesdogs22tv.com/uploads/1/3/1/3/131384169/a6f03a8.pdf
    • http://files.porvenirmassacre.org/uploads/1/3/1/0/131070161/643464e8.pdf
    • https://cdn.shopify.com/s/files/1/0433/0727/0312/files/kilubik.pdf
    • https://cdn.shopify.com/s/files/1/0432/1758/4283/files/65242129297.pdf
    • https://cdn.shopify.com/s/files/1/0431/3464/8474/files/10255799963.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/livejuxutuwogosizanaxaz.pdf
    • https://cdn.shopify.com/s/files/1/0436/8531/4715/files/71715543415.pdf
    • https://cdn.shopify.com/s/files/1/0432/4835/3442/files/48346133157.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/serway_faughn_college_physics_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/5329/3469/files/6th_grade_science_comprehension_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/2587/4600/files/architectural_design_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9112/4643/files/66989425979.pdf
    • https://cdn.shopify.com/s/files/1/0435/5896/1320/files/56155591574.pdf
    • https://cdn.shopify.com/s/files/1/0437/4937/6161/files/algorithmen_kapieren.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/atto_notorio_sostitutivo.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_off000066a8.bin
22010f3f300c89edd26f0602759c8e4bd833abc2abdecfa5a54bbbc6bf4e1b0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x66A8 5040 bytes
font_01_sfnt_off000077ec.bin
8f2c1c84b132f63a4f079e038b7b064c9a8b0b742d563e7edcda0ce4332a727f
pdf-font-stream PDF embedded font (sfnt) at offset 0x77EC 10120 bytes