Malicious PDF — malware analysis report

Static analysis result for SHA-256 c393bf83ad86c461…

MALICIOUS

PDF

58.6 KB Created: 2020-09-01 01:31:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd7f3808f980598c1194a52766f7f3e6 SHA-1: 3c1154ff4ad847e0ab48a18f826251f49247090b SHA-256: c393bf83ad86c461453bad6e23871fb640ac590fd714f2b23d027a9cfa354456
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.cc/wix?keyword=management+reporting+systems+examples'. Another critical heuristic indicates a PDF link farm, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains text related to reporting systems and includes the malicious URL, reinforcing the lure.

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=management+reporting+systems+examples
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/fourth_quarter_earnings_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/6680/9765/files/nofaxozibujuga.pdf
    • https://cdn.shopify.com/s/files/1/0462/6654/8373/files/47198772962.pdf
    • https://cdn.shopify.com/s/files/1/0433/4521/5656/files/mobetonikatatirobagekeko.pdf
    • https://static.usrfiles.com/ugd/12f4eb_2d4384f51ce549fba20354c4b92bb69e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f66ac0daeb2f408eb6c9e2a914be82ff.pdf
    • https://static.usrfiles.com/ugd/7dd30d_c77aff78060e4e31b538306817c8dd4e.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5394b67b6eb420ba181c0e7eca91549.pdf
    • https://cdn.shopify.com/s/files/1/0434/6675/2164/files/oasis_episode_2_release_date.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6918/files/cell_phone_addiction_test.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0660/files/zukotujerasuw.pdf
    • https://static.usrfiles.com/ugd/ab0441_00254d9b74794fe6938b0077863873f2.pdf
    • https://static.usrfiles.com/ugd/12dc78_879877651d494ac8bbb5c634dc7a2e99.pdf
    • https://static.usrfiles.com/ugd/e2c250_0ac577e920ce47b9b873b7f900fd2fe1.pdf
    • https://static.usrfiles.com/ugd/79e5df_51904d46fd7d47419e22ecc8b5777784.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_off0000a807.bin
3cdbe964163505fa74468170b45b51cac1f5ac23431a6b739daa0caa72f141f2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA807 5312 bytes
font_01_sfnt_off0000ba1d.bin
f5d07547ad8766d59e574403d4164f20ed049e63f43735fccc260ccaa2b1d1f2
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA1D 10412 bytes