Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed9e0df51a20d7d…

MALICIOUS

PDF

44.1 KB Created: 2020-08-18 23:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e930c65e42f80ce1f7ace21fe9e1f14 SHA-1: 52639671afb7686f8b17a0b12c92eeea45d0a784 SHA-256: 1ed9e0df51a20d7d323d9eb1f0b10fb81e4d1127fb94cdfcb002cfcb24172d71
152 Risk Score

Malware Insights

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

This PDF document contains multiple embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'imperialism vocabulary worksheet answers' and includes the malicious URL. The presence of numerous links, many pointing to Shopify, suggests a link farm or SEO poisoning tactic to disguise the malicious redirector. 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.ru/pify?keyword=imperialism+vocabulary+worksheet+answers
    • http://posiwoj.miststl.com/uploads/1/3/0/7/130776485/keniworuva_gugemo_kujijo_limizugunetirer.pdf
    • https://cdn.shopify.com/s/files/1/0439/0620/3803/files/tamil_books_online.pdf
    • https://cdn.shopify.com/s/files/1/0430/1373/4563/files/jenoputivu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6105/1546/files/59950044468.pdf
    • https://cdn.shopify.com/s/files/1/0430/6527/8625/files/templateoptions_angular_formly.pdf
    • https://cdn.shopify.com/s/files/1/0435/8579/8301/files/tikutijevikoxupezow.pdf
    • https://cdn.shopify.com/s/files/1/0428/5281/0911/files/57809220213.pdf
    • https://cdn.shopify.com/s/files/1/0437/4849/1415/files/2109664044.pdf
    • https://cdn.shopify.com/s/files/1/0437/9354/7424/files/wigexumekawidasibisan.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5611/files/75794914620.pdf
    • https://cdn.shopify.com/s/files/1/0447/8582/7991/files/sock_merchant_solution.pdf
    • https://cdn.shopify.com/s/files/1/0439/6757/8270/files/28138839756.pdf
    • https://cdn.shopify.com/s/files/1/0433/7913/0531/files/chest_x_ray_report_for_asthma.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/46845004140.pdf
    • https://cdn.shopify.com/s/files/1/0436/8610/1145/files/31255572007.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064a0.bin
71337577fef36e46ce718a09ca2836f03782d5f6ddaf742f46b904026ecd8998		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A0 1560 bytes
font_01_sfnt_off00006c91.bin
5010322c3f994333427701e079e123dc9a5b896587ef49fdc36ed0fee487f32c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C91 5568 bytes
font_02_sfnt_off00007f6b.bin
66ad132cae58af83abf6785926002174a469c7b9946508569e40feb0d8c6cd59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6B 10440 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.