Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d18393b407197be…

MALICIOUS

PDF

47.5 KB Created: 2020-08-18 19:44:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 76d17072107dac58e1247b540e88f882 SHA-1: ba70967cd1973ce2d2d2aafaff08cc18f931e503 SHA-256: 8d18393b407197bedf04b2c4936f94b0fed30df6dd1e832346e353f436a502a0
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.cc/pify?keyword=mcgraw+hill+connect+algebra+1+answers`. This indicates the document's primary purpose is to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains text related to 'mcgraw hill connect algebra 1 answers' and numerous embedded URLs, many hosted on `cdn.shopify.com`, suggesting a link farm or SEO poisoning tactic to attract victims. The presence of a malicious redirector URL is the highest priority IOC.

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=mcgraw+hill+connect+algebra+1+answers In PDF document text
    • http://files.drgaranzuay.com/uploads/1/3/0/7/130738836/kusifa.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/1/0434/3490/1660/files/amplitude_shift_keying_using_matlab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/65832067566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4173/4311/files/marcha_antalgica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4833/6536/files/bella_y_bestia_rachel_bels.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8956/7650/files/nijiniremobidejuzopur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4615/0039/files/sonepuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5304/6165/files/mezasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9928/3863/files/vinunatadapalesonebidupik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4055/5676/files/clinical_nutrition_assessment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0805/7759/files/vijuxojugifajumevas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0005/2387/files/warhammer_total_war_bretonnia_army_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4652/5338/files/55918094591.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0123/4076/files/88292714665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3712/9895/files/projection_matrix_formula.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73F0 5352 bytes
SHA-256: 583b260d447e89ad08a5cd30aac879b3431a730c68225e52195a4889131b825a
font_01_sfnt_off00008638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8638 13396 bytes
SHA-256: 9fba15afb17a010d96992d65b55ec94afc1e3d8aac6795b72e4128a4934a3446

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