Malicious PDF — malware analysis report

Static analysis result for SHA-256 a681ce4b27a0da55…

MALICIOUS

PDF

47.6 KB Created: 2020-07-28 14:08:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 78bdc6f4ed5b17f9386d3758f3f9a0a3 SHA-1: a2f9334cf32c02252114a0512c8fb2174b055fa3 SHA-256: a681ce4b27a0da55cf679e8ac0c6c3bd73c7121581cc033fdd70f264749bf197
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to a known malicious redirector. Additionally, PDF_SEO_LINK_FARM indicates a large number of external PDF links, with one pointing to cdn.shopify.com. The document body is heavily obfuscated and does not provide clear textual lures. The primary attack vector appears to be directing users to malicious or suspicious external resources.

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=boom+shankar+trance+music In PDF document text
    • http://files.mybestmake.co.uk/uploads/1/3/1/4/131453484/winarifotom.pdfIn PDF document text
    • http://files.tear-a-page.com/uploads/1/3/0/7/130738714/simeminom_rujozugexezaw.pdfIn PDF document text
    • http://files.lady-arlete.com/uploads/1/3/1/3/131380008/8231599.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1760/1181/files/bolamuru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/99554040700.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5127/0815/files/90560046029.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/xasunupuromubodibezividem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/nakarobawobod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1963/1765/files/nizabetupiluguvilarulapi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0490/8952/files/falenibepiwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1556/1638/files/12592758769.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1423/4013/files/6188295632.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6516/3422/files/bufamosusizuzataje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9005/9157/files/16769503060.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7130 5004 bytes
SHA-256: f016ed3bff66e22e5feed4eff691076ce1a01e30b6f8921d0e5d82f891428178
font_01_sfnt_off0000820a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x820A 10312 bytes
SHA-256: dcdd6531533e1bc1bbf650eb3f54050a29fcda668c0e5060a2c4b6b8270b9782
font_02_sfnt_off0000a573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA573 2928 bytes
SHA-256: 84369ef1d00369f0626a5db7745853cd1119ee73024487211cd9aa4e1191701c

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