Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a8fab9689aca676…

MALICIOUS

PDF

44.2 KB Created: 2020-08-19 03:10:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4f7011d785f4065b487a2c99defcceba SHA-1: e3db34cd8bf90ed3bc617c956eeeec6fc0ae903e SHA-256: 3a8fab9689aca6764015f2f96978bd659f7c9ec3b74b344bcbe321fcba9960be
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, pointing to 'https://ttraff.ru/pify?keyword=com.+ionitech.+airscreen+pro+apk'. This URL is likely used to redirect users to a malicious site. The document also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm used for SEO poisoning or to obscure malicious destinations. The document body contains garbled text but includes the suspicious URL and references to an APK file, suggesting a lure for users to download potentially malicious software.

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.ru/pify?keyword=com.+ionitech.+airscreen+pro+apk In PDF document text
    • http://files.tedgoodden.net/uploads/1/3/0/8/130814232/7dbe1ef0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9240/1558/files/65583192877.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/8365650837.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/72424169051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0897/4235/files/mijodixa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0210/1923/files/kiwakumoduwiwexeri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4039/0819/files/vacancy_in_ethiopian_reporter_newspaper_amharic_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1449/6161/files/98778692375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4809/2323/files/silicosis_disease.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6387/8566/files/lixugiredojamobu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3153/5509/files/31021388981.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 2

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_off000058f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58F8 5048 bytes
SHA-256: 7887dabbe53a0b51f8f12e335cca2dd0f6cdd7e26c9724a644b6ada26bd5cfad
font_01_sfnt_off000069eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69EB 14096 bytes
SHA-256: 43c6830e6ba8b4391c56fe9701e0eacd421fd01b0f9504f8e80238c20021481b
font_02_sfnt_off0000964b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x964B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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