Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6021e2c02f8cdb6…

MALICIOUS

PDF

44.6 KB Created: 2020-08-29 12:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c0069986c0a690409bad56d10b826e5 SHA-1: 897c3e05431955190e765c145cd6699b6fb022a1 SHA-256: c6021e2c02f8cdb63c7bdf3289c804b33ace86ebf843e1b73ba55a8fd3ac335f
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'comprehension passages' and includes the malicious URL, suggesting a lure for educational content. The primary malicious IOC is the redirector URL, which likely leads to further malicious content. No scripts were extracted from this sample.

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/wix?keyword=comprehension+passages+with+questions+and+answers+for+grade+8
    • https://cdn.shopify.com/s/files/1/0439/7904/7070/files/75471243981.pdf
    • https://cdn.shopify.com/s/files/1/0436/1378/2173/files/wasifulusofavisemu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/boxing_fight_games_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/4682/0245/files/daboxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3568/1180/files/fuwawodebijilasali.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc3e5999a7de4cafb3d8ed7e44dd68bf.pdf
    • https://cdn.shopify.com/s/files/1/0440/6116/3670/files/amino_acids_biochemistry_and_nutrition.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9292/files/79895515862.pdf
    • https://cdn.shopify.com/s/files/1/0435/3936/6047/files/origen_de_las_bacterias.pdf
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/nakama_1b.pdf
    • https://static.usrfiles.com/ugd/b8c837_a14da25cc78048a3a60dba82ab30c952.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ce50a00bcfa4c2d85261539ac5df8fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_1419705ab4874e0bac4a3c4176785338.pdf
    • https://static.usrfiles.com/ugd/b8c837_15e92f99d0184713afe8be59e0e5d453.pdf
    • https://static.usrfiles.com/ugd/b8c837_a1aa3331b76b4f1cab0b80ad2e97d24b.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_off000060e6.bin
a931b4783643af3092425464e90633ab59bd1ef2dbfa63d0649defb74be56e77
pdf-font-stream PDF embedded font (sfnt) at offset 0x60E6 5740 bytes
font_01_sfnt_off0000744a.bin
592dd542c5c76aa5ba42ed7c16690dec473eb758c165f9d1a5934d0db9c238bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x744A 10200 bytes
font_02_sfnt_off00009721.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x9721 4324 bytes