Malicious PDF — malware analysis report

Static analysis result for SHA-256 f599e7de17ab49ea…

MALICIOUS

PDF

53.0 KB Created: 2020-09-01 03:04:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2ee16b0ac6218701168ee3d0ffc30de4 SHA-1: acc7ae244e7ac6c68cbf0912a9580813abf76ee4 SHA-256: f599e7de17ab49eadf613f3c4b879d1fd776c1fae5f949cacd6bf89eb6bef726
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious Link

The PDF document was flagged by a machine learning classifier and heuristics indicate it contains a malicious redirector link and a large number of external links, suggesting an attempt to manipulate search engine results or lead users to harmful content. The document body contains the primary malicious URL, which is likely intended to lure users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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.ru/wix?keyword=best+movies++website+quora In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/bb13a2_654e6d988f3e487ba9e88c01bd8ca64e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/69695d_4c84ad9982cd4668b465f2ae7bb349e8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_7ac9d0e5cf1f46d081f2ad6ed61f82e4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6116da_123909ebb2284677abb8943fb9fbd7cc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a2c2bc_d3a78fbc102044dd9ed9d4f3debecfb7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0512/3493/files/7231208131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0667/2546/files/nawurepilojiwofukib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8050/6791/files/yahama_250_cc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e1d12c_0f122347df32403ea0de3e7b7d340f73.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_515eaca7ad8d4dcc94d13af5426e78b9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4492/0726/files/chandu_ke_chacha_ne_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2879/0946/files/machiavelli_the_prince_david_wootton.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7663/9127/files/comentario_contexto_cultural_biblia_nuevo_testamento.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sitomomuwarusubewikujo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8231 3796 bytes
SHA-256: f078d2c80265f602453624c8d3c5338bcd27dc887cdc68143c0cce2c588e06d7
font_01_sfnt_off00008fa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FA7 5268 bytes
SHA-256: 3c497ba8aafc981bb3fa5676bfaacd5e4a7393c92375b28d115de8ecd804b8d4
font_02_sfnt_off0000a18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA18F 11060 bytes
SHA-256: 565188fc60298d06ad0e99cd145c334c1b1f6065e0558942f7e04faf4f1e9481

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