Malicious PDF — malware analysis report

Static analysis result for SHA-256 555a0ce818e3c07e…

MALICIOUS

PDF

33.6 KB Created: 2020-08-17 04:39:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b7e4a74184b6b31db6299a2d9fa739d0 SHA-1: 486977a282511cdd77974ec91868cfcc4c8e6f54 SHA-256: 555a0ce818e3c07e316b823521827a7ab9a1730fbeafd0b0278492f08702fb30
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to a lure for a Call of Duty APK. The document body, though heavily obfuscated, contains the same URL. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning or to obscure the final malicious destination. The ML classifier also strongly indicated maliciousness.

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=apk+call+of+duty+apkpure In PDF document text
    • http://files.dreifert.com/uploads/1/3/1/6/131636655/fudoji-dasuvazifu-dazurutowu-febate.pdfIn PDF document text
    • http://xukego.lisassalonspa.com/uploads/1/3/1/0/131070588/3ad1677.pdfIn PDF document text
    • http://gutareg.easy1upbusiness.net/uploads/1/3/0/9/130969192/108257d.pdfIn PDF document text
    • http://kesopape.txstang.com/uploads/1/3/0/7/130776688/zibawido-zadetum-zikazutinuwovu.pdfIn PDF document text
    • http://zolubi.studio6works.com/uploads/1/3/2/6/132680813/kewelabolexabekukid.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/1/0433/6379/5096/files/fetolivikexaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3295/1446/files/retencion_placentaria_bovinos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7836/6885/files/riloxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1283/2931/files/30190448581.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/ridepafomudebiwefugi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9256/6435/files/java_abstract_class.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/67329414420.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6067/2165/files/tiwotis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6935/7728/files/54158013120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/32559710806.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 1

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_off0000471b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x471B 5124 bytes
SHA-256: b0c512b64f22ccb2d651cd026afebc25eb361fbb464206f50cd3ee580f44f330
font_01_sfnt_off0000589f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x589F 9716 bytes
SHA-256: 5865bd7c2615f467724a1c87bf997c08c87d2a3936cf0d59355bc25d4f664765

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