Malicious PDF — malware analysis report

Static analysis result for SHA-256 eebed0ef14b17b8c…

MALICIOUS

PDF

62.9 KB Created: 2020-08-09 13:37:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d892cb73fe6fcba1d0813b10be6ab6a8 SHA-1: 8d60fc5a016d6d501840b8971247941cf87d2777 SHA-256: eebed0ef14b17b8c4742537fe62de66163ebf0a05964712cfe10caf84b2e2b5d
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'free pdf download' lure, and the ML classifier strongly indicates maliciousness. The primary malicious URL identified is https://ttraff.com/pify?keyword=become+a+better+you+joel+osteen+free+pdf+download, which is likely used to redirect the user to further malicious content.

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=become+a+better+you+joel+osteen+free+pdf+download
    • http://files.bishopsstortfordjudo.com/uploads/1/3/1/6/131608016/vogeletuxu.pdf
    • http://files.kierstenmodglinauthor.com/uploads/1/3/0/7/130739646/6731417.pdf
    • http://files.fnaq.org/uploads/1/3/0/9/130969944/nivubuluro.pdf
    • https://cdn.shopify.com/s/files/1/0429/2991/4012/files/ahmet_mit_istanbul_hatras.pdf
    • https://cdn.shopify.com/s/files/1/0437/5789/5841/files/bososevabigefajapadu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/dowry_prohibition_amendment_act_1984.pdf
    • https://cdn.shopify.com/s/files/1/0440/5883/7142/files/over_and_over_again_nelly.pdf
    • https://cdn.shopify.com/s/files/1/0429/8460/3801/files/19900809770.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vololo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8103/1064/files/lovel.pdf
    • https://cdn.shopify.com/s/files/1/0440/4976/0421/files/dimensi_budaya_organisasi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8052/3678/files/snes_mortal_kombat_moves.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81236671698.pdf
    • https://cdn.shopify.com/s/files/1/0436/3301/6982/files/sowizakipeta.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_off0000b637.bin
d0648cc9f29662ea781aef8a84b6481852477e63a8337f79f6e83ff698024a95
pdf-font-stream PDF embedded font (sfnt) at offset 0xB637 5760 bytes
font_01_sfnt_off0000c9cb.bin
458a98e92ffd75390e202e2bbe3f1e3c298ed85c0557891f2c8c7e20c28239e0
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9CB 10128 bytes