Malicious PDF — malware analysis report

Static analysis result for SHA-256 851c783f7f28dc64…

MALICIOUS

PDF

43.3 KB Created: 2020-08-11 07:32:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 838a0ce976d3ddeee4c84b938a4294bd SHA-1: 00593a5925ccbfa02cf0875d9647e7b8e82248b3 SHA-256: 851c783f7f28dc649b7401b75e923c133f0c60e33ccd9c62c5ec7f5ce9464ed5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of these links, 'https://ttraff.com/pify?keyword=when+we+dead+awaken+adrienne+rich+pdf', is flagged as a malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing. The presence of a link farm and a malicious redirector indicates a phishing or scam attempt.

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=when+we+dead+awaken+adrienne+rich+pdf
    • http://files.marbellacommunity.com/uploads/1/3/0/8/130874205/gokuwukagibawewu.pdf
    • http://nafivul.ontoyouresale.com/uploads/1/3/2/8/132814930/gejipa.pdf
    • http://files.uottawabgsa.ca/uploads/1/3/0/7/130739731/01b5713f100.pdf
    • http://files.erichotz-portfolio.com/uploads/1/3/1/4/131483147/mivunov-pifaxupije.pdf
    • http://kunosivas.farmtruckphotographyanddesign.com/uploads/1/3/1/4/131406082/vixilugifakelofoju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0449/2463/3243/files/lista_de_frases_mas_comunes_en_ingles.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5511/files/free_marbles_identification_and_price_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/an_inspector_calls_exam_questions.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lunugituvalu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9202/5249/files/41956055123.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/jukinapupupirireb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0523/8692/files/suwukolizixev.pdf
    • https://cdn.shopify.com/s/files/1/0428/8089/3084/files/wajofidazuduroxelimufex.pdf
    • https://cdn.shopify.com/s/files/1/0432/2200/7965/files/best_to_word_converter_nitro_cloud.pdf
    • https://cdn.shopify.com/s/files/1/0434/7002/8966/files/fepidamav.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d3f.bin
6fbbd034f4ad7289cbb223087034ee66f424a94dfb8db587c92ff0013ca450d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3F 5200 bytes
font_01_sfnt_off00007efb.bin
8a56c5e0a0cc5bd7258280746e086bd58fdaaa2b21d8de63cd7a0f0a98c7d2cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EFB 9928 bytes

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