Malicious PDF — malware analysis report

Static analysis result for SHA-256 675016a26781b558…

MALICIOUS

PDF

59.6 KB Created: 2020-08-14 15:23:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3d5a014cd2aec8719c04829f695f2fb SHA-1: a711e25a06d0dd1bb9116ac39557f04295ae53ab SHA-256: 675016a26781b558de159eead5c052ed68ef717add112d2ca9bf93d3e453ef2d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.cc/pify?keyword=rrb+ntpc+admit+card+bilaspur+2019. The document body, though heavily obfuscated, contains references to 'admit card' and numerous links to PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. 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.cc/pify?keyword=rrb+ntpc+admit+card+bilaspur+2019
    • http://files.exodusblog.com/uploads/1/3/1/6/131606256/pijelo.pdf
    • http://files.racebiomed.org/uploads/1/3/0/7/130775510/wasibitodulibi.pdf
    • http://pufabod.newleaflanguage.com/uploads/1/3/2/6/132681443/ddcd370a502.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/20170861287.pdf
    • https://cdn.shopify.com/s/files/1/0430/5177/8202/files/55901838139.pdf
    • https://cdn.shopify.com/s/files/1/0430/7936/8858/files/iliac_crest_bone_graft_technique.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/21487669885.pdf
    • https://cdn.shopify.com/s/files/1/0434/8067/8564/files/tamil_ultra_hd_movies_2019.pdf
    • https://cdn.shopify.com/s/files/1/0437/2886/3397/files/veneduwixewusika.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2103/files/nisefulev.pdf
    • https://cdn.shopify.com/s/files/1/0433/9322/0775/files/64613728573.pdf
    • https://cdn.shopify.com/s/files/1/0430/6970/2306/files/upsc_anthropology_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0430/9408/1687/files/meridian_555_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/5153/2963/files/pepasejofebole.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/semopow.pdf
    • https://cdn.shopify.com/s/files/1/0443/7016/5916/files/c_for_dummies_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/6106/7428/files/deductive_reasoning_math.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009047.bin
090505d4bea4911af5c5c4016c3a396e70bad1578e5e0661cc7931fc9a1d0efd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9047 5848 bytes
font_01_sfnt_off0000a408.bin
7a0fb16e9d04ae4859451b83d1489295e8f46a13a67992d8c863e4b14eb14991		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA408 10632 bytes
font_02_sfnt_off0000c872.bin
4e9502dcc86e7f867f004b30b224955faa4ac8a0c4e5475eb165205a28d26ca2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC872 7252 bytes

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