Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bbde3e84217b4ea…

MALICIOUS

PDF

38.4 KB Created: 2020-08-14 04:06:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4c8f42e7e968d1fc7216090f84088fe8 SHA-1: 6690ae197a0ffa8c5ae0f4b4930fde6d2688410b SHA-256: 8bbde3e84217b4ea9cedbafca22b2d9fb221ad06f90afc57595495a7ca454b25
202 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious content. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body itself is heavily obfuscated but contains references to 'Citrix receiver for ipad', suggesting a potential lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=citrix+receiver++for+ipad In PDF document text
    • http://files.kenmaremindfulnessandyoga.com/uploads/1/3/1/3/131384359/f0b3882cf823.pdfIn PDF document text
    • http://ruwejeraf.transformingbunburyswaterfront.com.au/uploads/1/3/0/7/130776031/jumelivapaganir-jibugadinowowog-kufasotivile.pdfIn PDF document text
    • http://files.rohsalgebra.com/uploads/1/3/0/8/130814758/2567403.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/1/0430/7379/8298/files/68302464887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/najegirerudisox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0778/6657/files/bacterias_gram_negativas_e_positivas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3314/1149/files/wajumarikefewoxakeveb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9436/8663/files/jubudibureloxenuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9090/2166/files/jekiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3123/0624/files/simple_present_3rd_person_singular_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1204/6491/files/40174711194.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1893/4677/files/learn_to_play_guitar_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3252/7526/files/23083025186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/oasis_don_t_look_back_in_anger_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/wafiwuzotipabilezaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2787/3440/files/mulezadim.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 5

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_off00005926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5926 4972 bytes
SHA-256: 896c44d29d636c5767f053c7122dcc39487392745f19248025ced8be1abc7428
font_01_sfnt_off00006a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A22 10136 bytes
SHA-256: 3a12f7530d96989b8530a0f622b38b889a42d0d7d11bb4f7daf106d078286a96

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