Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1008a5def149e81…

MALICIOUS

PDF

42.4 KB Created: 2020-08-06 14:42:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 227d9c3fe0463160d29bdf9939a56a6a SHA-1: 7e47a2f0bbee3fab74f0b12f34c0fcc3025fa8b1 SHA-256: d1008a5def149e81fb3dfc97b339be69860679c924abe7567358d2f326889b88
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=pmo+analyst+interview+questions+and+answers+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to 'pmo analyst interview questions and answers pdf', suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly flagged this PDF as malicious.

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=pmo+analyst+interview+questions+and+answers+pdf
    • http://files.b-wellnow.net/uploads/1/3/1/6/131606335/padadominavilokitewa.pdf
    • http://files.zolayka.com/uploads/1/3/1/6/131607075/vubokilitona_tanezolere.pdf
    • http://files.ipksportsbetting.com/uploads/1/3/1/3/131380786/pujabavirirese.pdf
    • https://cdn.shopify.com/s/files/1/0454/8227/9062/files/short_story_for_childrens_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/flip_words_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/6335/3244/files/pazuxijotanuwe.pdf
    • https://cdn.shopify.com/s/files/1/0437/1090/6520/files/36504043810.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/97671057318.pdf
    • https://cdn.shopify.com/s/files/1/0436/9914/2810/files/jexukalabedod.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45397061855.pdf
    • https://cdn.shopify.com/s/files/1/0435/8828/8675/files/berlitz_english_level_4_____book.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6533/files/pafonajilabitise.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_off0000671f.bin
48afe50e930ca124af6eeadc7009969f5d62e69d95d09925239010259cefbd3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x671F 5568 bytes
font_01_sfnt_off00007a0b.bin
1582fd30ac13a634fac6892a72f831dbe40f2abe4a025c36178a4b7cac183647
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0B 10276 bytes