Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a621f90e19e2605…

MALICIOUS

PDF

43.1 KB Created: 2020-07-31 21:58:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 012c46be04c80303846fe07c65681a3f SHA-1: ccc2f2564e850fa9d22f84b6a07e12b2d9e6394b SHA-256: 1a621f90e19e2605105de21f77f9af51930523e45a698c07d18d0188b2355300
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, suggesting an attempt at SEO poisoning to drive traffic to malicious infrastructure. The primary heuristic firing indicates a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=css3+interview+questions+and+answers+pdf'. The document body, though heavily obfuscated, contains this URL and references technical content, reinforcing the lure. No scripts were extracted from this sample.

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=css3+interview+questions+and+answers+pdf In PDF document text
    • http://files.lindveit.com/uploads/1/3/0/8/130814245/a399215dc2.pdfIn PDF document text
    • http://files.neonopen.com/uploads/1/3/2/6/132682022/1237491.pdfIn PDF document text
    • http://files.kilsythcommunitychurch.com/uploads/1/3/2/8/132814071/zukux.pdfIn PDF document text
    • http://files.nextgenrugcleaning.com/uploads/1/3/0/7/130740522/masaweriligo.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/1/0438/8506/8456/files/21068999652.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/mezigulusajoxewukideruwap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9121/3980/files/15322427591.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2745/5382/files/87659233442.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5470/1463/files/80022221679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5020/4327/files/kajefewekolisuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4138/2812/files/zalubuna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/28074402520.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2915/8295/files/85405790858.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/9302435616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasidobedibugamis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5313/8591/files/bebow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8615/1833/files/zomuminudujove.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4066/8838/files/22778405466.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 8

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_off0000685f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x685F 5348 bytes
SHA-256: dd0d94db79f70a8227d24a2dc07e59fba7361efa729d3ab396c2960f78c48ad8
font_01_sfnt_off00007aaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AAF 10724 bytes
SHA-256: 9fd56aa6143899c8f208abfc199be4bc6f3cdd939a97b51789167e221fab6abe

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