Malicious PDF — malware analysis report

Static analysis result for SHA-256 a58ecb9d44bcb13a…

MALICIOUS

PDF

32.8 KB Created: 2020-08-12 02:26:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4c65b49f3817a6e7b3f17be216a81c9e SHA-1: c6c8d4018529773ba5f1b5515c56f7c089beb7f6 SHA-256: a58ecb9d44bcb13a2da17384b0170db4432cff22bab540ff0c9ec455ef493d1d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links designed to appear as legitimate downloads, but they redirect to a malicious domain identified as a redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate a link farm strategy to lure users. The ML classifier also strongly flagged this PDF as malicious. The embedded document body text, though heavily corrupted, contains the URL https://ttraff.ru/pify?keyword=pearson+physics+textbook+answers+pdf, which is a known malicious redirector.

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=pearson+physics+textbook+answers+pdf In PDF document text
    • http://files.lanagates.com/uploads/1/3/0/7/130775825/zaneredikajolawaba.pdfIn PDF document text
    • http://files.alisonpilkington.com/uploads/1/3/0/9/130969710/4333994.pdfIn PDF document text
    • http://files.leiladyamy.com/uploads/1/3/0/9/130970003/duvukedosafa.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/1/0434/7530/4612/files/tuwulipiwutopabubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6718/7108/files/43628970793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6816/1184/files/online_translate_chinese_to_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8362/8697/files/16095517660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4977/0408/files/mugozejetadawituge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pesaveput.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/migunege.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/jibuxawuzi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/32936052851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6589/2264/files/60394180387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4651/0497/files/titesoxebibosawofogavoti.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000042e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42E6 5676 bytes
SHA-256: bdca5fb5db2286d97abc54a384c83d41d20ee86dc646a0d6c8ec1098371a3eaa
font_01_sfnt_off00005643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5643 9556 bytes
SHA-256: 621cca413d49d659e2461c747fa9031bcb2c03890edbf19ee93154de88f8e5e4

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