Malicious PDF — malware analysis report

Static analysis result for SHA-256 d71b99efdfc150cc…

MALICIOUS

PDF

42.6 KB Created: 2020-08-14 10:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c5f6743c4827e5b6087fa674ecafbd27 SHA-1: bf5775e768652bd5d0f4948e8bc9b22a850d17f9 SHA-256: d71b99efdfc150cc93f72d188847282cd9534213c5e2ea3f4d63e92d1c337511
170 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=backyard+baseball++android'. Another critical heuristic identified a large PDF link farm hosted on Shopify, suggesting an attempt to generate traffic or distribute content. The presence of a 'download button' lure further supports a malicious workflow. No scripts were extracted, but the link-based redirection is a common initial access vector for phishing and malware delivery.

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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=backyard+baseball++android In PDF document text
    • http://binosa.bribetter.com/uploads/1/3/0/9/130969723/8026259.pdfIn PDF document text
    • http://files.dirtydavesdetailing.com/uploads/1/3/0/8/130813755/kirifut.pdfIn PDF document text
    • http://files.alessclutteredlife.com/uploads/1/3/0/7/130775837/a015a8.pdfIn PDF document text
    • http://files.drrjbattechiropractic.com/uploads/1/3/0/8/130873941/barigox.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/1/0432/9334/3899/files/kodipovukog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9220/5978/files/51159880854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/28798056311.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6856/3351/files/34687115120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4828/7912/files/zatupunizudugotuludus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8910/6846/files/43234300555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2741/4695/files/android_studio_get_model_name.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21659337375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8789/6480/files/alita_battle_angel_movie_counter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1274/3591/files/simetef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/sudetuwopemawofipotipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7432/2586/files/29884024630.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9394/1671/files/59343222395.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 6

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_off00006954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6954 5288 bytes
SHA-256: c7d879a4e942da9adc5dc4153d63db1f55e20d655f01a267c61c526b7f42d09d
font_01_sfnt_off00007b62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B62 9968 bytes
SHA-256: cf336e1f036e57d1b194d8c237aaed8cb0090c189963f0175f36db3873ca170c

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