Malicious PDF — malware analysis report

Static analysis result for SHA-256 0849981851d277ef…

MALICIOUS

PDF

44.7 KB Created: 2020-09-04 11:57:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 540dcd39428d2cde30717c95c3ac38e5 SHA-1: 3445aa378b08f2bf32a144f385056f6b08fe5a08 SHA-256: 0849981851d277ef335cb37d12f2b65d7b86bf9efc324f0fb5aa808d5f816312
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a redirector URL that appears to be part of a phishing or scam campaign. The document body, though heavily obfuscated, contains text that includes the malicious URL and a benign-looking PDF link, suggesting an attempt to disguise malicious intent. The ML classifier also strongly indicated maliciousness.

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.me/pify?keyword=ashes+cricket+2013+pc+iso
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/4133/9030/files/2_kids_one_sand_box.pdf
    • https://cdn.shopify.com/s/files/1/0439/3464/6440/files/vezafumuxigoletavejodun.pdf
    • https://cdn.shopify.com/s/files/1/0437/2257/1930/files/5322137276.pdf
    • https://cdn.shopify.com/s/files/1/0428/5205/7244/files/microsoft_ergonomic_keyboard_4000_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/1942/6197/files/amalgam_composition.pdf
    • https://cdn.shopify.com/s/files/1/0468/0712/2071/files/sowajitufejib.pdf
    • https://cdn.shopify.com/s/files/1/0433/5845/3918/files/labilinatonugulilosow.pdf
    • https://static.usrfiles.com/ugd/69695d_5864e0a89ac24cf2b5dc5b40fb19e789.pdf
    • https://static.usrfiles.com/ugd/429b25_f7b63128fb71468197d1f6cb071783d2.pdf
    • https://static.usrfiles.com/ugd/70c1f8_370498914e0a4a3a9a576c6712890cf7.pdf
    • https://static.usrfiles.com/ugd/b8c837_7e6b4f78c61047bbb36f3180580c07c0.pdf
    • https://static.usrfiles.com/ugd/0e6328_1560f6f6870b4934a8d621df235ce433.pdf
    • https://cdn.shopify.com/s/files/1/0435/0047/0438/files/ascanio_in_alba_mozart.pdf
    • https://cdn.shopify.com/s/files/1/0455/6704/9893/files/printable_lowercase_alphabet_templates.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071aa.bin
0d7b6940d5faf3c44a17084da0b53dbd7e20a2d0727c2845c54a371d2f4d045f
pdf-font-stream PDF embedded font (sfnt) at offset 0x71AA 5324 bytes
font_01_sfnt_off000083c8.bin
841978066fdd3b9d543639ef85733451277cf2a37e4e2737d2f22b29a72515b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x83C8 9980 bytes