Malicious PDF — malware analysis report

Static analysis result for SHA-256 908159eeb74f253a…

MALICIOUS

PDF

53.3 KB Created: 2020-08-19 06:18:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 70c1d303297d7da2106e8c6d3ba86404 SHA-1: e55699aa9e87bd47dbbe56d366a76472f3dbc860 SHA-256: 908159eeb74f253acf0d4c77c576bd680f6eb51679c99d29b5c8cd6ac0ca8759
202 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 'ttraff.ru'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of external links, many hosted on Shopify. The presence of a 'download button' lure further supports a malicious intent. The primary malicious IOC is the redirector URL, which likely serves as a gateway to a phishing page or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=android+assets+absolute+path In PDF document text
    • http://files.healthyhap-peanutrition.com/uploads/1/3/2/6/132681194/9058261.pdfIn PDF document text
    • http://files.msbooksandart.com/uploads/1/3/1/3/131384442/vasuz-joxixelano-suzuxa-zugirom.pdfIn PDF document text
    • http://files.outerbankslivemusic.com/uploads/1/3/2/8/132814826/04495a78d.pdfIn PDF document text
    • http://jatuso.phusikosskincare.com/uploads/1/3/0/7/130738850/f2fe27c.pdfIn PDF document text
    • http://files.optimisticliving.com/uploads/1/3/1/3/131380771/lujusaduzajeziw_kubelupig_zatetapapoli.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/1/0432/7230/6852/files/gebowum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6371/9574/files/61058561646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2564/5211/files/37523118968.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/past_present_future_perfect_tense_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8545/4757/files/66464667119.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/8400/8862/files/juxotekegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9938/1146/files/canaanites_history.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8762/4344/files/kesibibisivuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1448/7198/files/assessment_monitoring_and_evaluation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9952/1181/files/sokutejizuzegeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7966/1736/files/48067958179.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00007451.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x7451 9244 bytes
SHA-256: 6fdfbf7cfffe697bbcf48849188849f1480dfecdf34b4293f38a84bbd894e59b
font_01_sfnt_off00009309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9309 5176 bytes
SHA-256: a8d3d277ed262d10129ceb0ad54305c6eda0babff12c2ab4b70688607861e908
font_02_sfnt_off0000a491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA491 10344 bytes
SHA-256: be5a02f6d80cdb6ec00a2e6cf114a3f438c3cd3dc3326b0fb475aa886cbf3320