Malicious PDF — malware analysis report

Static analysis result for SHA-256 508e3cfb405b2567…

MALICIOUS

PDF

42.9 KB Created: 2020-08-19 20:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4c380ab678db407231610ef0079399d5 SHA-1: 40f8388c91036ff73644b58159293ca4854ecf21 SHA-256: 508e3cfb405b25679e5f701710a9413f4b9dac17b42d6b96ee0f0b4892fc591b
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a redirector to 'ttraff.com', suggesting a link farm or phishing lure. The document body, though heavily corrupted, contains text related to 'credit risk management thesis pdf', indicating a social engineering pretext to encourage users to click the malicious link. No scripts were extracted, but the presence of a malicious redirector and link farm strongly suggests the intent is to lead the user to a malicious site.

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.com/pify?keyword=credit+risk+management+thesis+pdf In PDF document text
    • http://files.frandaniellaucerica.com/uploads/1/3/0/7/130776298/mukowonanibilakinoka.pdfIn PDF document text
    • http://xokux.kandersonmusic.net/uploads/1/3/1/3/131380594/zilituzejoza_getibirugemiti.pdfIn PDF document text
    • http://files.bouldervalley.org/uploads/1/3/1/4/131438682/2434411.pdfIn PDF document text
    • http://files.mikecurtisfootball.com/uploads/1/3/2/8/132815367/zapitibol.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/1/0431/6584/3620/files/trueman_biology_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7795/0870/files/gopigibogo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6620/3029/files/labogaberizusolipuki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7409/3217/files/centroids_and_center_of_gravity.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0925/3282/files/66671456943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1460/9305/files/bonakepilitinevume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4495/4527/files/tokenumagewerujedafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/theory_of_interest_kellison.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5312/0664/files/seven_stages_of_grief_worksheet.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_off000069c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69C6 5392 bytes
SHA-256: 97de79f5feea33df8e0c8b8ae6c7d6f3e962527cd425e999a2ff7306a1d4196c
font_01_sfnt_off00007bf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF1 10076 bytes
SHA-256: 656147238b2c211d9163ad102b433ff203b9f7ad18ff670fdf41b8499cfbc47a

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