Malicious PDF — malware analysis report

Static analysis result for SHA-256 88a1db1dea6f719a…

MALICIOUS

PDF

37.7 KB Created: 2020-08-10 14:58:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e4183812a2c8a61e31633b2115340c68 SHA-1: 84ed716ba0a260514494339c0a7ec5f67357be5a SHA-256: 88a1db1dea6f719a7311a1ac20456661577a677be1d465ba3aba43f70d327f40
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, including a malicious redirector at 'https://ttraff.com/pify?keyword=caatinga+clima+pdf'. This suggests the document is designed to lead users to malicious websites, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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=caatinga+clima+pdf In PDF document text
    • http://files.lindsidechristianchurch.com/uploads/1/3/1/3/131379828/7851174.pdfIn PDF document text
    • http://files.nespa203.com/uploads/1/3/1/3/131381804/xiwegoluvazam.pdfIn PDF document text
    • http://files.sloanekennedy.com/uploads/1/3/0/7/130775245/9753011.pdfIn PDF document text
    • http://files.brothersboudreaux.com/uploads/1/3/0/7/130775126/170f7f7.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/1/0428/8249/8716/files/66963979115.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6896/2469/files/kelikovunaralukas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9137/6794/files/wuvilavokazukibe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0800/7072/files/mapufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2014/7093/files/dobofosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1682/2679/files/argumentation_schreiben_bung.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1701/1353/files/gigemap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1961/6935/files/81728206186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6971/6118/files/dojuwapetoritazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4011/1782/files/48917833664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1021/1491/files/is_limewire_still_available.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56C7 5104 bytes
SHA-256: 98fb60a493609f639be57db16832fd64b3365edac525d56d173fdff5f449dccb
font_01_sfnt_off00006816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6816 10316 bytes
SHA-256: 1c3898fb51c5f8f33d1095da0df3e75fb57e53a6dfd71717dba7e5add90d4044

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