Malicious PDF — malware analysis report

Static analysis result for SHA-256 045ab6c945287964…

MALICIOUS

PDF

32.0 KB Created: 2020-08-24 02:27:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d33281b2b8ddc309e3ef32814f532a1b SHA-1: d1319ad8829e5997ab8dafcc5992690d22e514ee SHA-256: 045ab6c945287964fd19043cdaa41d2c9a01afa5728e456dc83e3b7948abc86a
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to host further malicious content or phishing pages. The document body, though obfuscated, contains the same URL and appears to be a lure for academic content, likely to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness.

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=ionic+bonding+lewis+dot+structure+worksheet
    • http://files.heartofthewest.org/uploads/1/3/0/9/130969254/9116138.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0319/1194/files/free_al_quran_indonesia_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8077/files/33064132470.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9074/files/prove_that_every_convergent_sequence_is_bounded.pdf
    • https://cdn.shopify.com/s/files/1/0445/6411/9716/files/adaptive_optics.pdf
    • https://cdn.shopify.com/s/files/1/0438/6439/1845/files/14765312227.pdf
    • https://cdn.shopify.com/s/files/1/0435/1760/8090/files/begrijpend_lezen_groep_8_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0434/8100/6246/files/relacion_renina_aldosterona.pdf
    • https://cdn.shopify.com/s/files/1/0430/6137/9226/files/talent_acquisition_definition.pdf
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/avery_5162_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/3119/8886/files/umt_cohort_datesheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5978/1538/files/kevisize.pdf
    • https://cdn.shopify.com/s/files/1/0433/4652/6376/files/26464103663.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/rafagakaxamiza.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_off000042cd.bin
768cff8aec4e137aa767e38edc5196fc13d46bbd9751ab448538065bff975cf5
pdf-font-stream PDF embedded font (sfnt) at offset 0x42CD 5224 bytes
font_01_sfnt_off0000549e.bin
7321ddb068dfbc0b3bf9924eebf5178af2f3786fe4c16b3e7e806a50586ef52e
pdf-font-stream PDF embedded font (sfnt) at offset 0x549E 9004 bytes