Malicious PDF — malware analysis report

Static analysis result for SHA-256 753c16ad23a12c17…

MALICIOUS

PDF

43.2 KB Created: 2020-08-21 06:41:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 694ec432e8a0e7614cee9fafc9a3077a SHA-1: 6d6c6cec844788f90cf66c700201b445e80b6137 SHA-256: 753c16ad23a12c17ac90811e1973350b7f112a36cdabdfcf54aaee23054311b6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, identified as a link farm, with a critical heuristic firing for redirecting to known malicious infrastructure. The primary malicious URL identified is `https://ttraff.cc/pify?keyword=agrarian+skies+2+maps`. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to lure users to malicious content, likely for phishing or malware distribution.

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.cc/pify?keyword=agrarian+skies+2+maps In PDF document text
    • http://files.vividboutiquehsv.com/uploads/1/3/2/7/132712225/1652694.pdfIn PDF document text
    • http://files.ccpdiscoveryschool.com/uploads/1/3/0/7/130775528/a630a59c088cc.pdfIn PDF document text
    • http://files.janmwagnerfineart.com/uploads/1/3/0/7/130775053/57a24dad52158d.pdfIn PDF document text
    • http://bulilal.understandingfreedom.net/uploads/1/3/2/6/132696280/serivigaw.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/1/0430/9866/9220/files/37814221014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2921/7958/files/apprendre_l_italien_facilement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5625/1555/files/pakistan_bait_ul_mal_sweet_home_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/libeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/nct_127_cherry_bomb_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0111/0940/files/xowabuke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/borobakowuvoradev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5335/0055/files/paripifisanigewok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5281/7832/files/pijiko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6980/8550/files/my_first_arabic_alphabet_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/daisy_1894_bb_gun_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/colorado_unemployment_insurance_tax_report.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a3d.bin
b79b10e61d8d7f0500f4ad9a026f535bba3758a0635b957fd86d23905d3d5dfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3D 5292 bytes
font_01_sfnt_off00007c2f.bin
d95d44bc43b6e4ee260807362f80a6c5baf616463f1f36ae2f638cbd32e62e0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C2F 10444 bytes

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