Malicious PDF — malware analysis report

Static analysis result for SHA-256 000229569b1694a7…

MALICIOUS

PDF

36.9 KB Created: 2020-08-29 16:00:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: caffbae5bcd9d6bd9c00ffc05f3bee07 SHA-1: 501de44bd70f8d0cad34cf8695984c3f4a855af4 SHA-256: 000229569b1694a723f42fc323115e94aeda0f95949df7822fe708e981aeda42
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF document exhibits characteristics of a link farm, embedding numerous external links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the sheer volume of outbound links suggests an attempt to manipulate search engine results or distribute further malicious content through the linked PDFs.

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/wix?keyword=research+design+qualitative+quantitative+and+mixed+methods+approaches+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7329/7814/files/dotamixomi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5911/7222/files/cartagena_colombia_travel_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/9244/3303/files/19933082950.pdf
    • https://static.usrfiles.com/ugd/49be48_03b0b4cbcce941888973d579b668236b.pdf
    • https://cdn.shopify.com/s/files/1/0429/8165/4691/files/zopinuzobi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7946/7170/files/fuvebopasubipinowov.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/89813693006.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7637/files/koxoluse.pdf
    • https://cdn.shopify.com/s/files/1/0434/7337/1288/files/70849578020.pdf
    • https://cdn.shopify.com/s/files/1/0465/3121/5510/files/oxford_english_english_marathi_dictionary_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3584/files/93260609600.pdf
    • https://cdn.shopify.com/s/files/1/0430/5397/3657/files/tabe_practice_test_level_d.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_off00004f47.bin
beff43ab234898c3712bc610d86d69a443cb08ed2df3a35831e46b59db18ce94
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F47 5832 bytes
font_01_sfnt_off000062fd.bin
1d94cb8a8f54fe8ffc8a6829480865a98743093377bb9a3d84cfe4945cf36c01
pdf-font-stream PDF embedded font (sfnt) at offset 0x62FD 10636 bytes