Malicious PDF — malware analysis report

Static analysis result for SHA-256 dadcee3a9d464ca6…

MALICIOUS

PDF

40.5 KB Created: 2020-08-11 01:37:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24c591ba5e706d075ea8a1ea6e1a0f82 SHA-1: 62717e038811dc26df5bb0bbeb4e4f71c50ea86a SHA-256: dadcee3a9d464ca6c2f7352943b61baf7c9d504254b1aff4c16ccb37b47c5236
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.com. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/pify?keyword=character+traits+word+list+pdf
    • http://files.jill-arwen-posadas.com/uploads/1/3/1/8/131872055/86543dd0.pdf
    • http://files.y2kfla.com/uploads/1/3/1/4/131455832/xavozawigakusomi.pdf
    • http://files.emeralddriveproductions.com/uploads/1/3/2/6/132681757/pajogofikiga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0094/6073/files/50891927641.pdf
    • https://cdn.shopify.com/s/files/1/0432/4179/9843/files/24660581054.pdf
    • https://cdn.shopify.com/s/files/1/0430/9388/5089/files/napevupebatalixofopix.pdf
    • https://cdn.shopify.com/s/files/1/0440/3652/2149/files/css_move_text_down.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39738284996.pdf
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/kupukumos.pdf
    • https://cdn.shopify.com/s/files/1/0432/8669/1998/files/xemozesajagexemuruvi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/wosonajiwuvowefatuvavib.pdf
    • https://cdn.shopify.com/s/files/1/0434/5266/1912/files/98654774375.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/51343530378.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000607e.bin
45254b269a9e87c725dd57c686dd602e1c38e59be251b8e6572507ccb0353a21
pdf-font-stream PDF embedded font (sfnt) at offset 0x607E 5240 bytes
font_01_sfnt_off0000725e.bin
96363d056f09b34fec9e53333a412f30ce3e4bd2e44bdb52f8ff2b197577da64
pdf-font-stream PDF embedded font (sfnt) at offset 0x725E 10708 bytes