Malicious PDF — malware analysis report

Static analysis result for SHA-256 c13aae9d4f1b9491…

MALICIOUS

PDF

45.4 KB Created: 2020-08-23 18:12:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7092ce7f1a2ae2b80742144cc0adfb87 SHA-1: 48c832a368f9b760f7221382532c098991c52585 SHA-256: c13aae9d4f1b9491733586925bd7643f9e397c4497885e2ed3049835834b0818
194 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to a link farm hosted on Shopify. The primary malicious indicator is a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. No scripts were extracted from this sample, and the document body was heavily obfuscated.

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=craft+cms+contact+form+attachments In PDF document text
    • http://files.wastelandarade.com/uploads/1/3/0/7/130739810/8831818.pdfIn PDF document text
    • http://kokowod.allthingscpr.com/uploads/1/3/1/4/131453501/6221289.pdfIn PDF document text
    • http://files.havewoolwewilltravel.com/uploads/1/3/1/4/131437736/5786132.pdfIn PDF document text
    • http://files.parenting-examiner.com/uploads/1/3/1/4/131437619/zekigun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3670/2870/files/47803914597.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40169505762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/4517/9807/files/adda_247_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6118/2617/files/96278755046.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5426/0633/files/hardy_weinberg_equation_practice_problems_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7702/6463/files/john_deere_185_hydro_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1428/9568/files/filter_data_in_excel_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61238086127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9869/4042/files/38735654822.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1896/0545/files/zegifad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2521/1296/files/42568927216.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8552/1311/files/bise_sukkur_inter_result_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8289/0918/files/kanivatetipafisewaw.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
font_00_sfnt_off000065ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65AC 4852 bytes
SHA-256: 0a2ce5fc30a52b3bde9e072b1614261464d03409d34976e35ea909fc135ffb3d
font_01_sfnt_off000075e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75E8 10748 bytes
SHA-256: 3831bb5b78d8405396a2b9115c96c7354a265c6cfd2bbd15ad03ff58bec22a63
font_02_sfnt_off00009a9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A9F 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2