Malicious PDF — malware analysis report

Static analysis result for SHA-256 c520b2fddeed8a34…

MALICIOUS

PDF

42.3 KB Created: 2020-08-13 22:39:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: acb926097cad37ce10b9faac5d2f30d0 SHA-1: 57ad24cf5e24b6186706873515e09539b4268466 SHA-256: c520b2fddeed8a34347fcc288ce85f34f0aa016052bca6e706b111da98bafaa8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, including a primary link to a known malicious redirector. The document body, though heavily obfuscated, contains the same keyword as the malicious URL, suggesting a lure. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating an attempt to drive traffic to malicious infrastructure. No scripts were extracted, but the PDF structure itself is used for the attack.

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.cc/wb?keyword=manualidades%20con%20botellas%20descartables%20en%20forma%20de%20animales In PDF document text
    • http://difuvove.chicagobrickpaving.com/uploads/1/3/2/6/132683188/6196700.pdfIn PDF document text
    • http://vexaje.krisbenyopottery.com/uploads/1/3/1/0/131071164/xugiwesoxovagipowi.pdfIn PDF document text
    • http://files.lesswastelaura.com/uploads/1/3/1/0/131071037/xakejuv.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/1/0431/1800/2343/files/tagizaxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7745/9365/files/kemolijo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5359/6322/files/5745181307.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2357/8789/files/what_is_a_frame_of_reference_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6663/6953/files/66155258718.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2274/3712/files/maferelojunonu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2450/6266/files/lanoborogokipusigos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/88958580011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9847/2605/files/dasubagoge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2014/7095/files/finnegans_wake_lyrics.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C13 5312 bytes
SHA-256: ef6ca6e16c61494815a714f92739649ec615108e492ed22655593b11c62fa2ec
font_01_sfnt_off00006dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFA 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off00007688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7688 10764 bytes
SHA-256: 4070b561cde4923075fb0838439b3c85976c12ed820d567707aa8ec63b77e818

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