Malicious PDF — malware analysis report

Static analysis result for SHA-256 161b03c212bb476a…

MALICIOUS

PDF

39.9 KB Created: 2020-08-17 16:13:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 29950d5dd8589c4bda2a03103046ed97 SHA-1: 3f0bc38964686f5c2f266bd029e6238b702bdd51 SHA-256: 161b03c212bb476a6949c3f65b844c238cfb43b070fd98468600d14b5e0bf668
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service, indicating an attempt to create a link farm for SEO manipulation or phishing. The primary redirector URL is associated with malicious activity. The document body, though heavily obfuscated, contains references to the malicious URL, suggesting the document's purpose is to drive traffic to this malicious site, likely for a scam or further malware delivery.

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=lspdfr+crash+callouts In PDF document text
    • http://files.karilagandancesociety.org/uploads/1/3/2/7/132712057/3463889.pdfIn PDF document text
    • http://xiwirizub.antiqueautomobilia.com/uploads/1/3/1/8/131857419/mepavafonuf-xulakovo.pdfIn PDF document text
    • http://fagadanug.kwameopoku.com/uploads/1/3/1/6/131606289/wosuj.pdfIn PDF document text
    • http://files.techniquejobs.com/uploads/1/3/1/4/131406816/2390231.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/1/0435/5837/1496/files/silokudabem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8348/8679/files/kidim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9437/6605/files/zezekuzeruzogufizip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4760/0796/files/datagerosilezufupapok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6878/3782/files/19389441921.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/sufon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0659/0104/files/95261243730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5782/3390/files/all_unearthed_arcana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/wutegijenolifuvigifipunad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9885/5837/files/firunuriwesotolunan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1870/6331/files/80118387754.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5374/3270/files/42029881695.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_off00005dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD8 5184 bytes
SHA-256: 426a561690b7b7633fe9161a4c5a53b47888f9cf2ae52f7f4a633d3ca47dba49
font_01_sfnt_off00006f73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F73 10448 bytes
SHA-256: f3062a13fdfe32b700fb0882324cb22eb23bcf34e2cfa79a821335d82fcde194

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