Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d37ac5e77020da…

MALICIOUS

PDF

51.7 KB Created: 2020-08-30 08:38:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 492321bd7ade3401a1a72ebf1106d4f5 SHA-1: ff425327c0fe97971d9d34c4b6b0dba7a2574eeb SHA-256: 04d37ac5e77020da70fb2de8c3c2211315fe2282dd799f3b42ae5afa48df6bc5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.cc'. The document body also contains a large number of embedded links to external PDFs, many of which are hosted on Shopify. The primary malicious URL is 'https://ttraff.cc/wix?keyword=claim+evidence+warrant+worksheet', which is likely used to redirect the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=claim+evidence+warrant+worksheet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9150/0961/files/30878586583.pdf
    • https://cdn.shopify.com/s/files/1/0429/6350/1222/files/nekifovideti.pdf
    • https://cdn.shopify.com/s/files/1/0429/8955/1770/files/barbie_games_makeup.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/38299496568.pdf
    • https://static.usrfiles.com/ugd/5438e3_b7ed17f5b6c24851923b7dcfe117dcd4.pdf
    • https://static.usrfiles.com/ugd/b77b08_351ad5435d7844b2b62ead830bfd28ac.pdf
    • https://static.usrfiles.com/ugd/aff7ca_8f713753204b4641b39ff0a0ebe3ae0f.pdf
    • https://static.usrfiles.com/ugd/7e6083_4ffb0a8c93364c0e98f91884e27eeaca.pdf
    • https://cdn.shopify.com/s/files/1/0433/3164/9689/files/hawke_cable_gland_size_chart.pdf
    • https://cdn.shopify.com/s/files/1/0435/5047/4399/files/char_broil_vertical_charcoal_smoker_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/64371901563.pdf
    • https://cdn.shopify.com/s/files/1/0429/1425/0905/files/35550174946.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jobevemavesofidubuxiwi.pdf
    • https://static.usrfiles.com/ugd/b8c837_39b8b4365f7e4d7295fc93e10f219f40.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f3231aef4ee41f991438e683adcb6bc.pdf
    • https://static.usrfiles.com/ugd/b8c837_05d5040985d642f49455785083da860d.pdf
    • https://static.usrfiles.com/ugd/b8c837_0d99c5cff958414d9f97e2035af8e32a.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000080e8.bin
85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80E8 2828 bytes
font_01_sfnt_off00008ae2.bin
7bf9da69a536a3a984ab789a7654c7fb7249892dbec3dedfd63ec269077d2e94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE2 5300 bytes
font_02_sfnt_off00009cd4.bin
d2bfd6eaed518f1bb90460656c0c7b656d68b892ad0919ab2bc2629a3e5c81b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CD4 10020 bytes

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