Malicious PDF — malware analysis report

Static analysis result for SHA-256 28409d8b362b7ba9…

MALICIOUS

PDF

48.7 KB Created: 2020-08-16 21:11:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c4692ec52763598f06f6c51872f45a06 SHA-1: ce0729f540bd074fabdb63ee8f035f51f410cc8f SHA-256: 28409d8b362b7ba9c7fc1860127ea44a8098050e5608515d847e05b09dfc8ad9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a specific malicious redirector URL, disguised as a free template download. The primary malicious URL is ttraff.ru, which is known for redirecting to malicious content. The document body, though heavily corrupted, contains the lure text and the malicious URL. The presence of numerous PDF links and a redirector strongly suggests a phishing or scam attempt.

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=free+gantt+chart+template+for+mac+numbers In PDF document text
    • http://files.shannonvilledrags.com/uploads/1/3/0/7/130775108/jakegegowi_maxaxajudena.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/1/0433/1149/7366/files/guxumunopevijusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9512/9254/files/christian_baby_names_with_meaning_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1243/1776/files/33072880222.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98629167596.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7605/8274/files/16377814797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/dexesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/46029347595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/short_asvab_practice_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0564/8807/files/xulujosiwuxuzarax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0975/9640/files/careers_in_computer_science.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/badidife.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0791/7729/files/37536084701.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F72 5524 bytes
SHA-256: f434f7dc93c8b2ed9c3515afce70e4982e1c481da50b77f304718f7c690aa844
font_01_sfnt_off00007205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7205 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00007a92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A92 11588 bytes
SHA-256: 732eee573020d565136d681eae36444fcaec97d7c6a0e63dceabd0e910686335
font_03_sfnt_off00009fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FB4 16304 bytes
SHA-256: 36298d9b42482ef505b651e9545134b76438dad7e59d1f17d96a2cc3761d4b83