Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a75785ea1ecedd5…

MALICIOUS

PDF

46.1 KB Created: 2020-08-08 18:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7b7b3910b2111e805f86b039ac9f649d SHA-1: 7e72554b0a54bbf223dd98e49f22de46dbacb5a6 SHA-256: 2a75785ea1ecedd5a1164a8a6adb23a53eb64de9cd1866cc05c8e78a967db400
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which are designed to appear as academic resources. One of the primary links redirects through a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious payload or phishing site. The document body, though heavily obfuscated, contains references to the embedded URLs, reinforcing the link-farming attack pattern.

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/pify?keyword=hubungan+metabolisme+karbohidrat+lemak+dan+protein+pdf In PDF document text
    • http://files.msamsonovcpa.com/uploads/1/3/2/6/132681295/jibugejarus_bunuvovurasok.pdfIn PDF document text
    • http://files.jetcities.org/uploads/1/3/1/3/131397946/4500928.pdfIn PDF document text
    • http://files.mycityadd.com/uploads/1/3/1/1/131163879/b7d68c63bac3a.pdfIn PDF document text
    • http://files.emot-crankshaft.com/uploads/1/3/1/3/131381850/nunepujofuseliwak.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/1/0432/2004/1886/files/beraposununijexog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3696/7063/files/84758408413.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/41162707269.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4938/5110/files/prefix_postfix_infix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6415/5560/files/14428790572.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1588/7256/files/fefebijejivizalizukafimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2284/4067/files/fesawugujigugogos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9822/5320/files/78202006865.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/logajojekiketiwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6225/3978/files/sinoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5523/4710/files/53651906778.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_off000062c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C4 1684 bytes
SHA-256: 4d3fb6748bdbfc0676bbc246a341b567ec3707c335db72ae26270b639488ab50
font_01_sfnt_off00006b28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B28 5620 bytes
SHA-256: f1057c1473128aa6547fa256b121ba3f5bf00d7b909623badabf184cf8d5c838
font_02_sfnt_off00007e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E18 14624 bytes
SHA-256: d8522c2273db5bb37335c03955cd86a97a7814230a6fc333534ee91db0c0c290

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