Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee1e3730af41dfab…

MALICIOUS

PDF

52.3 KB Created: 2020-08-17 07:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 283c1e32c810c8b5acf264035849d8ae SHA-1: 4f21d14e22eb53b46eedf51b4840ef8b4a7fdb48 SHA-256: ee1e3730af41dfab1a5f5e03222af735f39a52a33d6d74af55788730e4d51901
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, contains text related to 'education board result marksheet 2018' and the malicious URL, suggesting a phishing lure. The PDF was flagged by a machine learning model and heuristics indicating malicious redirector links and a link farm, pointing towards a phishing or scam 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.ru/pify?keyword=education+board+result+marksheet+2018
    • http://files.dagninoiv.org/uploads/1/3/1/4/131406068/2e49401.pdf
    • http://files.lifegatestl.com/uploads/1/3/2/7/132712057/jogejoziradivulot.pdf
    • http://files.grapevineoasis.com/uploads/1/3/1/4/131483955/wujuxorojavonu_liboserilexi_fegetuzatudodi_loratipop.pdf
    • http://luruf.dubrovnik-coast.online/uploads/1/3/2/6/132681670/tefoxeworuvavi.pdf
    • https://cdn.shopify.com/s/files/1/0450/1327/0692/files/railway_reservation_form_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/5471/8358/files/57776119033.pdf
    • https://cdn.shopify.com/s/files/1/0430/3365/7498/files/nutrition_an_applied_approach_4th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/8547/0627/files/data_analysis_and_interpretation_in_qualitative_research.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6055/files/riwopowe.pdf
    • https://cdn.shopify.com/s/files/1/0438/7491/0376/files/69304624465.pdf
    • https://cdn.shopify.com/s/files/1/0435/2468/5976/files/washington_manual_of_surgery.pdf
    • https://cdn.shopify.com/s/files/1/0433/7447/7473/files/bijaxonusikazemuxamewe.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6331/files/1897526263.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/5442626563.pdf
    • https://cdn.shopify.com/s/files/1/0430/7045/5965/files/73611182886.pdf
    • https://cdn.shopify.com/s/files/1/0440/7571/2664/files/primary_english_learning.pdf
    • https://cdn.shopify.com/s/files/1/0436/2852/7776/files/ejercicios_de_caida_libre_4_eso.pdf
    • https://cdn.shopify.com/s/files/1/0428/7276/6631/files/88199392367.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_off00007107.bin
a8a1993118f744bfa0b526ed3f8dee94019a2f8effe58246b21e4b3e02f81b37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7107 5860 bytes
font_01_sfnt_off000084c1.bin
92459b5e4f31905116d44811de79b7e03d55cba77fe0148dd7427d5c4d33d767		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84C1 8632 bytes
font_02_sfnt_off00009ff9.bin
bc9ca014820cd4273cf6a6cd0f879b18ae07257e13f79e37101a62671cbacd78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FF9 10436 bytes

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