Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1adc0f685008247…

MALICIOUS

PDF

41.1 KB Created: 2020-08-25 21:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4074f7633c9955993ef02a5cf0939f3e SHA-1: e9386307073518b2a25ce6d63dc73a21a8239d87 SHA-256: a1adc0f685008247dfb4926cee68b2aa9f203082f41a236807a5f69c222b23b4
194 Risk Score

Malware Insights

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

The PDF contains a deceptive document body referencing 'Collocations for ielts writing task 2 pdf' to entice users. Crucially, it embeds a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=collocations+for+ielts+writing+task+2+pdf'. The PDF also functions as a link farm, pointing to numerous other PDFs hosted on Shopify, with at least one of these also being a redirector. This suggests a campaign to distribute malware or phishing 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.ru/pify?keyword=collocations+for+ielts+writing+task+2+pdf In PDF document text
    • http://files.beccaspianostudio.net/uploads/1/3/0/8/130815095/lunajejewapire.pdfIn PDF document text
    • http://files.malamathesea.com/uploads/1/3/1/1/131163590/vunuro.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/1/0429/8558/6849/files/xuxalotimubinimoxobodikap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9612/1248/files/962189324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0007/0307/files/25908029604.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5567/6580/files/glioblastoma_multiforme_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2641/4748/files/el_apologetica_de_tertuliano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/31249745074.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/6240/3739/files/90363320762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/donapolovopadamifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2985/5393/files/kabbale_numerologie.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 7

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_off00005a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A59 5516 bytes
SHA-256: e71164b282547e87b35b795b624f637371edbe2fcd4781a1d58607de96710090
font_01_sfnt_off00006d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3A 14872 bytes
SHA-256: 533c5161bcb5992a6ba8f75dbf9dcf1495864a05a12cea7c5aedbc06b85aa656

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