Malicious PDF — malware analysis report

Static analysis result for SHA-256 70aac3701aa74f9f…

MALICIOUS

PDF

39.2 KB Created: 2020-08-23 00:07:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f57b34e35566842e641203262e2478a1 SHA-1: 5913b37c028adb71129966abb40d0ac173fbbcff SHA-256: 70aac3701aa74f9f3c9893e0112a02d09f81a8f954c51931b3933a7c5be46a9f
194 Risk Score

Malware Insights

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

The PDF contains a link disguised as interview questions that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The PDF also hosts a link farm of other PDFs, suggesting an attempt to manipulate search engine results for phishing purposes. Although no scripts were extracted, the embedded URL and the nature of the heuristics strongly indicate a phishing attempt.

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=summer+camp+counselor+interview+questions+and+answers In PDF document text
    • http://files.becomeyogi.com/uploads/1/3/1/4/131438161/paxetumik-zerodulefivafo.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/1/0432/5218/7298/files/dividing_complex_rational_expressions_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8151/2613/files/wichita_mountains_climbing_guide_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4695/9261/files/google_play_store_apps_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0515/7284/files/technological_innovation_resource_allocation_and_growth.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7627/9702/files/15394592660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/biludetejuvujatolometa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2422/0321/files/49740068566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7794/9848/files/cisco_3750-_e_ios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2956/0481/files/tiwatobinolapubepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2051/7537/files/holy_grail_rs3.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 3

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_off00005c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C10 5600 bytes
SHA-256: ce3a1c0cbb1bb8108ac9783284a8ce73b9d53b69b6b8933346cffca346fb5204
font_01_sfnt_off00006f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F08 9736 bytes
SHA-256: abd79c621cd6a0500dc98192da604b8b77ec2ab88112dbfa5485dc314453c2c2

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