Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7cbc313f6c2eb04…

MALICIOUS

PDF

47.4 KB Created: 2020-09-07 04:24:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a42000b1aa5edfc245606239cc8078f3 SHA-1: 43178d19dd6bae33191e74348907567c1d34c44a SHA-256: a7cbc313f6c2eb04d079f598df520a29b427e725d1d2cb5de82b7054ce25c7e8
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The embedded URL, 'https://ttraff.link/wix?keyword=distributive+property+word+problems+worksheet+6th+grade', is the primary indicator of malicious intent, likely serving as a lure for further malicious activity. The document body, though heavily obfuscated, contains this URL and other benign-looking Shopify links, suggesting a social engineering pretext.

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.link/wix?keyword=distributive+property+word+problems+worksheet+6th+grade
    • https://cdn.shopify.com/s/files/1/0432/6955/4332/files/40925246720.pdf
    • https://cdn.shopify.com/s/files/1/0427/6961/2966/files/asciidoctor_apply_theme.pdf
    • https://cdn.shopify.com/s/files/1/0434/1851/7665/files/69741612019.pdf
    • https://cdn.shopify.com/s/files/1/0429/3669/6995/files/dijupisopuvonoririgokuku.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0664/files/633136000.pdf
    • https://cdn.shopify.com/s/files/1/0438/5121/9104/files/42575196639.pdf
    • https://cdn.shopify.com/s/files/1/0436/8069/4437/files/ischmie_msentrique_aigue.pdf
    • https://cdn.shopify.com/s/files/1/0440/2331/6630/files/65909772375.pdf
    • https://cdn.shopify.com/s/files/1/0432/6129/6790/files/avery_templates_5160_template.pdf
    • https://static.usrfiles.com/ugd/3f80ec_152604d8cde34768bebaa67e7ce2d934.pdf
    • https://static.usrfiles.com/ugd/b8c837_259b529153ee4d06878348b75a9551b3.pdf
    • https://static.usrfiles.com/ugd/d31907_98624cc8c8df4393a1076b4cb9849eed.pdf
    • https://static.usrfiles.com/ugd/ed2d23_a11eb41eec67499ab13aebca3f18f2a4.pdf
    • https://static.usrfiles.com/ugd/fafc38_4225548f794b48198b1870bad6a26433.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vonabubabosutogoxofe.pdf
    • https://cdn.shopify.com/s/files/1/0440/5516/7126/files/64754536537.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000623c.bin
19dd941d58a4639938e219b6d6a3fdcc967c130f116c3e31ca3b9ad08e004fd4
pdf-font-stream PDF embedded font (sfnt) at offset 0x623C 5984 bytes
font_01_sfnt_off00007686.bin
98b243fd0d675856c2a81f8163fbb948d5d145941f7a6482018068c1e35a9b0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7686 10804 bytes
font_02_sfnt_off00009b5b.bin
2d958bd008b8db5b33092f112e99c856adbcc0a100e950d14ff814b784be6357
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B5B 16060 bytes