Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c6a68e101f212ce…

MALICIOUS

PDF

40.2 KB Created: 2020-08-08 13:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55dfea2e7ae6681cc16d2efe376ab328 SHA-1: ff65de4ea633b11981eefd6acba03c96b0b6d0c5 SHA-256: 5c6a68e101f212ce64380fa36fa2133ff24205ccce84c7c006b7d6aff451c093
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The document body itself contains obfuscated text and URLs, including the primary malicious redirector URL. This indicates an attempt to drive traffic to malicious infrastructure, likely for further exploitation or phishing.

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.ru/pify?keyword=ankilostomiasis+adalah+pdf
    • http://files.hushpuppypetmassage.com/uploads/1/3/1/0/131070846/mapajabimirot-dexotezodugiz.pdf
    • http://files.thepeacefulpup.com/uploads/1/3/0/7/130775286/4e6fb9ea0a140a.pdf
    • http://sidor.athensorchestras.com/uploads/1/3/1/3/131398455/f333f5eca.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8523/3318/files/great_is_thy_faithfulness_hymn_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93515438816.pdf
    • https://cdn.shopify.com/s/files/1/0431/6915/3181/files/fogipuruti.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/7614883084.pdf
    • https://cdn.shopify.com/s/files/1/0437/6962/6781/files/solving_equations_algebra_2_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/32948107617.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pesaveput.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/36922746906.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/18852845348.pdf
    • https://cdn.shopify.com/s/files/1/0435/2252/3288/files/tanubolariguwugirawem.pdf
    • https://cdn.shopify.com/s/files/1/0429/7755/8681/files/jeximeloboranifufujorig.pdf
    • https://cdn.shopify.com/s/files/1/0430/5911/8229/files/excel_find_circular_reference.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_off00005f32.bin
f612896623127e243cc9f26c3a7a347fe3eff5f22a14d984d68384cf774ee5af
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F32 5236 bytes
font_01_sfnt_off000070e0.bin
d10200c9c2e4a856e99a833236ea524ec403e9634a38b99c9c17f7007384b084
pdf-font-stream PDF embedded font (sfnt) at offset 0x70E0 10204 bytes