Malicious PDF — malware analysis report

Static analysis result for SHA-256 c82d4cb119fc8640…

MALICIOUS

PDF

47.3 KB Created: 2020-08-23 16:15:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1dbf5e204d7e23392323c91cd6104e64 SHA-1: 89e63f4ed7289572afb4622a0e8935c1411be93a SHA-256: c82d4cb119fc8640c22c74cb1bb23511156ca717f4741e59099eab330f42aae3
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link and a link farm, indicating a phishing or scam attempt. The document body explicitly mentions 'Avast cleanup pro gratis' and includes a URL that redirects through 'ttraff.cc', a known malicious redirector. This suggests the document is a lure to drive traffic to malicious sites, likely for malware distribution or further phishing.

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.cc/pify?keyword=avast+cleanup+pro+gratis In PDF document text
    • http://gujakege.travis-wayne-goodsell.com/uploads/1/3/1/3/131383483/roxanabonojifunozoza.pdfIn PDF document text
    • http://xalat.kateholland.com.au/uploads/1/3/1/6/131606339/c45c53d47f.pdfIn PDF document text
    • http://files.elevatecbdcosmetics.com/uploads/1/3/0/7/130775592/5d35ad0cdad17e8.pdfIn PDF document text
    • http://files.ajharrisphotography.com/uploads/1/3/1/3/131383737/8727016.pdfIn PDF document text
    • http://files.nwosciencefair.ca/uploads/1/3/1/0/131070612/filuv_tomalunido_dinuf.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/1/0433/6952/9509/files/kanapatusosodosazum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6725/1617/files/bach_mass_in_b_minor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/full_bible_in_kannada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7149/4554/files/quantitative_aptitude_shortcut_formulas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6886/6212/files/48111806412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3125/7510/files/fafoguwapudodaguroduwafik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/safety_data_sheet_binder_cover.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6448/3240/files/64498349131.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000661b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x661B 5152 bytes
SHA-256: 244591b8ba030bc1deadb1c299424a5064864a26929b5fb144d39ef269f621e8
font_01_sfnt_off000077ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77AE 10360 bytes
SHA-256: 1377e146a598a7543d6bb7cacdc5c86bd5027ddec5f3a07de1c20354bc5627cc
font_02_sfnt_off00009b4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B4C 16144 bytes
SHA-256: f0a8b786da721c7415a59d91fbce3b20bbb98ea32e48857ac1ff22d53b00ec29