Malicious PDF — malware analysis report

Static analysis result for SHA-256 a116b834dc77b89a…

MALICIOUS

PDF

39.3 KB Created: 2020-08-18 21:20:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: de0cb7ee16b23fec43c36709979a9ed3 SHA-1: 4face87fc91ccb0f090b809d1ab6fcaa9d8a14fa SHA-256: a116b834dc77b89a9a5badf96f14c55bd24e26f4a872baa29d2ccd2b062d834c
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=html+to+pdf+library'. The document body, though heavily obfuscated, also contains this URL and other links pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lure users to malicious sites.

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.cc/pify?keyword=html+to+pdf+library In PDF document text
    • http://files.kpinst.org/uploads/1/3/2/8/132815343/pelufelulanigi.pdfIn PDF document text
    • http://files.alyssaleblancphotography.com/uploads/1/3/2/3/132303238/naroje_zuxoza_supusureridisig.pdfIn PDF document text
    • http://files.tatyanashealthblog.com/uploads/1/3/1/4/131454102/fixinenuvubirotupi.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/1/0437/2883/0632/files/dahua_cctv_camera_price_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8458/2813/files/mb_to_gb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65587220918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7313/2954/files/handwriting_practice_worksheets_a-_z.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8547/0623/files/2004_vw_beetle_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0349/3028/files/26948949913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6993/1671/files/88289177636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2129/2952/files/wwe_theme_song_2015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3095/3630/files/sibodapi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8967/3883/files/zuses.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 2

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_off00005cdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDB 5212 bytes
SHA-256: e4804586c5f4206473f6a56790b8eaf84c63bf60b82fc4a4881780f086104eb8
font_01_sfnt_off00006e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7C 9960 bytes
SHA-256: 2fc050771ae7709734e5b212d6a61ed263cbfa23d70cde4e50e3c9eb39473aa1

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