Malicious PDF — malware analysis report

Static analysis result for SHA-256 153475f6b383101f…

MALICIOUS

PDF

51.3 KB Created: 2020-08-16 20:03:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ca2371793997afc8199f0b8ce0ca9e3e SHA-1: 39d0857b716d71658d32116c450e68bc788c0c3a SHA-256: 153475f6b383101f6cf21fb77108448838e4cf55d35bad3e7fcfbb785a7f17a1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to a redirector service (ttraff.com) that appears to be part of an SEO link farm. The document body, though partially corrupted, contains the phrase 'Rimedio contro formiche naturale' (natural remedy for ants) and a URL that aligns with this theme, suggesting a phishing or scam lure. The ML classifier strongly indicates maliciousness, and the presence of multiple redirector links confirms a malicious intent to lead users to potentially harmful content.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.com/pify?keyword=rimedio+contro+formiche+naturale In PDF document text
    • http://files.ckc3.org/uploads/1/3/1/3/131383541/gujifalodavazexer.pdfIn PDF document text
    • http://files.georgeayee.com/uploads/1/3/1/3/131398195/dulofewedol-wutivepekatedi-saliwagoxoraz-wipuribamasada.pdfIn PDF document text
    • http://fomizi.greenlightbikes.org/uploads/1/3/1/4/131483108/b902bb7aad0.pdfIn PDF document text
    • http://files.homeralan.com/uploads/1/3/0/7/130739809/dasafeneguje-tesateve-fuwujifa-zemaviripinipa.pdfIn PDF document text
    • http://files.tonibragg.com/uploads/1/3/2/6/132696029/rokopaz-pekelajivipulu-rabujasesed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/23328084352.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0911/3242/files/pdf_agama_islam_kelas_10_k13.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4277/4935/files/arthritis_shoulder_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9164/8929/files/lapuwibek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7692/7134/files/23883207706.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1202/1662/files/bosch_oil_filter_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8576/5533/files/38361440294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/laxigitifudavizemitipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/nginx_too_many_open_files.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6426/1797/files/tapubadixev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51108684678.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000a23c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA23C 18512 bytes
SHA-256: 38939a4bd29e3846758173dbe673c6f3682e7e250d7c9c54cfb1e4b38d391e04
font_00_sfnt_off00006da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA0 5092 bytes
SHA-256: 46d9fbaee0e7426b5f6c4ce6163951a2f1086d1d32f054c2f83d98b7ae643aa5
font_01_sfnt_off00007ebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EBD 10912 bytes
SHA-256: 478a30bd8e391abce3d1995a309cd114c6cd15d25f74ccb5e8eea6a3d5f5ae83