Malicious PDF — malware analysis report

Static analysis result for SHA-256 df41fa34200aa49e…

MALICIOUS

PDF

46.0 KB Created: 2020-08-28 23:19:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e69ca386be6c1a104741467dbe648ea7 SHA-1: e084f069ae8f7b39ef21a607822b3c1e811ef839 SHA-256: df41fa34200aa49ee17f2cce41d3c88cf774871317d2b658c6e3226d8f6d7caa
154 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a malicious URL, disguised as an interview confirmation. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and the embedded URL strongly indicate a phishing or redirection attempt. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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=second+interview+confirmation+email+reply
    • https://static.usrfiles.com/ugd/b8c837_8a0c8d55a448421a8388470bbb5c2218.pdf
    • https://static.usrfiles.com/ugd/b8c837_b4105a9085274f2aa15636327422548c.pdf
    • https://static.usrfiles.com/ugd/b8c837_1de87f838e7b449388f40ad979f462a4.pdf
    • https://cdn.shopify.com/s/files/1/0437/0097/7818/files/taha_operations_research.pdf
    • https://cdn.shopify.com/s/files/1/0434/2313/7957/files/27366237350.pdf
    • https://cdn.shopify.com/s/files/1/0438/2579/1136/files/nokia_n73_auto_call_recorder_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/6318/0438/files/it_ebook_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/7332/2664/files/emotions_faces.pdf
    • https://cdn.shopify.com/s/files/1/0433/1218/5499/files/gabasimadumumezopagevaro.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/61280152127.pdf
    • https://static.usrfiles.com/ugd/b8c837_6750a3ee64b34a2597d692cbba752b09.pdf
    • https://static.usrfiles.com/ugd/b8c837_23f56fb7c5aa4f549d25ecc446686185.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d82f48c52684b2cb2f4299c37467ed4.pdf
    • https://static.usrfiles.com/ugd/b8c837_22fce6fc27c9450e922b808bbd7a702b.pdf
    • https://static.usrfiles.com/ugd/b8c837_0775ccb3b10543b584732e3dc8571d0a.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_off0000698e.bin
57e8b90f90c1f685a1691868772a8c9a78aa911b0f91bc2d46fc4b87f565b97c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x698E 5268 bytes
font_01_sfnt_off00007b66.bin
abaca5cb93607af4f53bf133afdaf661b1049967e969b35a95c08c8563015e34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B66 9836 bytes
font_02_sfnt_off00009d07.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D07 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.