Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd53a855fae9c9b1…

MALICIOUS

PDF

57.7 KB Created: 2020-07-31 03:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 20cab2623fffeb7fe308fb1d606d04cb SHA-1: a83d22567cc123dd40690c9e575f1d090347aa62 SHA-256: dd53a855fae9c9b1edc3f31e6aca5954fef5edbd6585f5241e919c89d03c226d
194 Risk Score

Malware Insights

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

The PDF file contains a high number of embedded links, with at least one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated, but the presence of the URL and the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic strongly suggest the intent is 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.ru/pify?keyword=buganda+agreement+of+1900+pdf In PDF document text
    • http://files.karenclachar.co.uk/uploads/1/3/1/1/131163492/soxibabem_nizalimopozasu_lutudenisexokil.pdfIn PDF document text
    • http://files.solightpro.com/uploads/1/3/1/8/131871605/18a3966dd5e00.pdfIn PDF document text
    • http://files.paranormalking.com/uploads/1/3/1/4/131438423/nadejadasopi_sulawonaxiwene_fipijubonoboto.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/1/0430/7428/9813/files/81223467088.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7557/5709/files/rimiwuvozamikovobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4931/2665/files/64807907829.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/divaripu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8665/2316/files/zapemezeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1690/3080/files/kojumabusijavupilolok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6329/5646/files/31164556449.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2191/0694/files/vizavemetujunesukup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9848/6424/files/57650587021.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8353/9366/files/96317937503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5586/4213/files/35666813256.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 4

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_off0000a5d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5D5 5384 bytes
SHA-256: 3457c6dabb06f38c8e2351ac0568d636e5c7b7e13d50c610caab022fd849eb06
font_01_sfnt_off0000b811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB811 9916 bytes
SHA-256: bf009c9d35b5b2c1142343ef9694b93dfa9936e040e79feccc494e816e19f4ab

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