Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e10d6449a13f925…

MALICIOUS

PDF

33.6 KB Created: 2020-09-07 22:39:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1c70f1918dd09af1c460f0ab590599ef SHA-1: ecbbd0ccca5ecc8eb8e4500b20996fcbd7e00af7 SHA-256: 5e10d6449a13f925e5458d10c3f550ade074d83c50aa0ee18efafa1ecce080f2
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 are SEO-optimized and point to other PDFs, forming a link farm. One of the primary links, 'https://ttraff.com/wix?keyword=measurement+and+instrumentation+textbook+pdf', is flagged as a malicious redirector. This suggests the document is designed to lure users into clicking through to malicious infrastructure, likely as part of a phishing or SEO poisoning campaign.

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=measurement+and+instrumentation+textbook+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9469/5329/files/second_conditional_lesson_plan_didactic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/refoditanid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3269/1367/files/conte_bilingue_arabe-_franais.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8524/2269/files/days_of_the_week_and_months_in_spanish.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3651/7286/files/guduzivimag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3765/5191/files/govulutoka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7574/7483/files/kekiwovonapefudulete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45366335679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/betej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/charms_abel_korzeniowski_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9793/9367/files/zutazesavezukuguxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/niv_journaling_bible.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/5968/0156/files/avengers_infinity_war_bengali_subtitles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5976/3617/files/kulovobizod.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000475a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x475A 5432 bytes
SHA-256: f094588223f40b05745b7f21b53f925510c0ce1adb839bffa50bdd63b1424a5e
font_01_sfnt_off000059c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59C4 9288 bytes
SHA-256: c4e78880a9eaf65ca3726de6be22ce24573981fe11b6e93a20b74a736118a86c

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